File: | clang/lib/Sema/SemaInit.cpp |
Warning: | line 2861, column 7 Called C++ object pointer is null |
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1 | //===--- SemaInit.cpp - Semantic Analysis for Initializers ----------------===// | ||||
2 | // | ||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||
6 | // | ||||
7 | //===----------------------------------------------------------------------===// | ||||
8 | // | ||||
9 | // This file implements semantic analysis for initializers. | ||||
10 | // | ||||
11 | //===----------------------------------------------------------------------===// | ||||
12 | |||||
13 | #include "clang/AST/ASTContext.h" | ||||
14 | #include "clang/AST/DeclObjC.h" | ||||
15 | #include "clang/AST/ExprCXX.h" | ||||
16 | #include "clang/AST/ExprObjC.h" | ||||
17 | #include "clang/AST/ExprOpenMP.h" | ||||
18 | #include "clang/AST/TypeLoc.h" | ||||
19 | #include "clang/Basic/CharInfo.h" | ||||
20 | #include "clang/Basic/SourceManager.h" | ||||
21 | #include "clang/Basic/TargetInfo.h" | ||||
22 | #include "clang/Sema/Designator.h" | ||||
23 | #include "clang/Sema/Initialization.h" | ||||
24 | #include "clang/Sema/Lookup.h" | ||||
25 | #include "clang/Sema/SemaInternal.h" | ||||
26 | #include "llvm/ADT/APInt.h" | ||||
27 | #include "llvm/ADT/PointerIntPair.h" | ||||
28 | #include "llvm/ADT/SmallString.h" | ||||
29 | #include "llvm/Support/ErrorHandling.h" | ||||
30 | #include "llvm/Support/raw_ostream.h" | ||||
31 | |||||
32 | using namespace clang; | ||||
33 | |||||
34 | //===----------------------------------------------------------------------===// | ||||
35 | // Sema Initialization Checking | ||||
36 | //===----------------------------------------------------------------------===// | ||||
37 | |||||
38 | /// Check whether T is compatible with a wide character type (wchar_t, | ||||
39 | /// char16_t or char32_t). | ||||
40 | static bool IsWideCharCompatible(QualType T, ASTContext &Context) { | ||||
41 | if (Context.typesAreCompatible(Context.getWideCharType(), T)) | ||||
42 | return true; | ||||
43 | if (Context.getLangOpts().CPlusPlus || Context.getLangOpts().C11) { | ||||
44 | return Context.typesAreCompatible(Context.Char16Ty, T) || | ||||
45 | Context.typesAreCompatible(Context.Char32Ty, T); | ||||
46 | } | ||||
47 | return false; | ||||
48 | } | ||||
49 | |||||
50 | enum StringInitFailureKind { | ||||
51 | SIF_None, | ||||
52 | SIF_NarrowStringIntoWideChar, | ||||
53 | SIF_WideStringIntoChar, | ||||
54 | SIF_IncompatWideStringIntoWideChar, | ||||
55 | SIF_UTF8StringIntoPlainChar, | ||||
56 | SIF_PlainStringIntoUTF8Char, | ||||
57 | SIF_Other | ||||
58 | }; | ||||
59 | |||||
60 | /// Check whether the array of type AT can be initialized by the Init | ||||
61 | /// expression by means of string initialization. Returns SIF_None if so, | ||||
62 | /// otherwise returns a StringInitFailureKind that describes why the | ||||
63 | /// initialization would not work. | ||||
64 | static StringInitFailureKind IsStringInit(Expr *Init, const ArrayType *AT, | ||||
65 | ASTContext &Context) { | ||||
66 | if (!isa<ConstantArrayType>(AT) && !isa<IncompleteArrayType>(AT)) | ||||
67 | return SIF_Other; | ||||
68 | |||||
69 | // See if this is a string literal or @encode. | ||||
70 | Init = Init->IgnoreParens(); | ||||
71 | |||||
72 | // Handle @encode, which is a narrow string. | ||||
73 | if (isa<ObjCEncodeExpr>(Init) && AT->getElementType()->isCharType()) | ||||
74 | return SIF_None; | ||||
75 | |||||
76 | // Otherwise we can only handle string literals. | ||||
77 | StringLiteral *SL = dyn_cast<StringLiteral>(Init); | ||||
78 | if (!SL) | ||||
79 | return SIF_Other; | ||||
80 | |||||
81 | const QualType ElemTy = | ||||
82 | Context.getCanonicalType(AT->getElementType()).getUnqualifiedType(); | ||||
83 | |||||
84 | switch (SL->getKind()) { | ||||
85 | case StringLiteral::UTF8: | ||||
86 | // char8_t array can be initialized with a UTF-8 string. | ||||
87 | if (ElemTy->isChar8Type()) | ||||
88 | return SIF_None; | ||||
89 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
90 | case StringLiteral::Ascii: | ||||
91 | // char array can be initialized with a narrow string. | ||||
92 | // Only allow char x[] = "foo"; not char x[] = L"foo"; | ||||
93 | if (ElemTy->isCharType()) | ||||
94 | return (SL->getKind() == StringLiteral::UTF8 && | ||||
95 | Context.getLangOpts().Char8) | ||||
96 | ? SIF_UTF8StringIntoPlainChar | ||||
97 | : SIF_None; | ||||
98 | if (ElemTy->isChar8Type()) | ||||
99 | return SIF_PlainStringIntoUTF8Char; | ||||
100 | if (IsWideCharCompatible(ElemTy, Context)) | ||||
101 | return SIF_NarrowStringIntoWideChar; | ||||
102 | return SIF_Other; | ||||
103 | // C99 6.7.8p15 (with correction from DR343), or C11 6.7.9p15: | ||||
104 | // "An array with element type compatible with a qualified or unqualified | ||||
105 | // version of wchar_t, char16_t, or char32_t may be initialized by a wide | ||||
106 | // string literal with the corresponding encoding prefix (L, u, or U, | ||||
107 | // respectively), optionally enclosed in braces. | ||||
108 | case StringLiteral::UTF16: | ||||
109 | if (Context.typesAreCompatible(Context.Char16Ty, ElemTy)) | ||||
110 | return SIF_None; | ||||
111 | if (ElemTy->isCharType() || ElemTy->isChar8Type()) | ||||
112 | return SIF_WideStringIntoChar; | ||||
113 | if (IsWideCharCompatible(ElemTy, Context)) | ||||
114 | return SIF_IncompatWideStringIntoWideChar; | ||||
115 | return SIF_Other; | ||||
116 | case StringLiteral::UTF32: | ||||
117 | if (Context.typesAreCompatible(Context.Char32Ty, ElemTy)) | ||||
118 | return SIF_None; | ||||
119 | if (ElemTy->isCharType() || ElemTy->isChar8Type()) | ||||
120 | return SIF_WideStringIntoChar; | ||||
121 | if (IsWideCharCompatible(ElemTy, Context)) | ||||
122 | return SIF_IncompatWideStringIntoWideChar; | ||||
123 | return SIF_Other; | ||||
124 | case StringLiteral::Wide: | ||||
125 | if (Context.typesAreCompatible(Context.getWideCharType(), ElemTy)) | ||||
126 | return SIF_None; | ||||
127 | if (ElemTy->isCharType() || ElemTy->isChar8Type()) | ||||
128 | return SIF_WideStringIntoChar; | ||||
129 | if (IsWideCharCompatible(ElemTy, Context)) | ||||
130 | return SIF_IncompatWideStringIntoWideChar; | ||||
131 | return SIF_Other; | ||||
132 | } | ||||
133 | |||||
134 | llvm_unreachable("missed a StringLiteral kind?")::llvm::llvm_unreachable_internal("missed a StringLiteral kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 134); | ||||
135 | } | ||||
136 | |||||
137 | static StringInitFailureKind IsStringInit(Expr *init, QualType declType, | ||||
138 | ASTContext &Context) { | ||||
139 | const ArrayType *arrayType = Context.getAsArrayType(declType); | ||||
140 | if (!arrayType) | ||||
141 | return SIF_Other; | ||||
142 | return IsStringInit(init, arrayType, Context); | ||||
143 | } | ||||
144 | |||||
145 | bool Sema::IsStringInit(Expr *Init, const ArrayType *AT) { | ||||
146 | return ::IsStringInit(Init, AT, Context) == SIF_None; | ||||
147 | } | ||||
148 | |||||
149 | /// Update the type of a string literal, including any surrounding parentheses, | ||||
150 | /// to match the type of the object which it is initializing. | ||||
151 | static void updateStringLiteralType(Expr *E, QualType Ty) { | ||||
152 | while (true) { | ||||
153 | E->setType(Ty); | ||||
154 | E->setValueKind(VK_PRValue); | ||||
155 | if (isa<StringLiteral>(E) || isa<ObjCEncodeExpr>(E)) { | ||||
156 | break; | ||||
157 | } else if (ParenExpr *PE = dyn_cast<ParenExpr>(E)) { | ||||
158 | E = PE->getSubExpr(); | ||||
159 | } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { | ||||
160 | assert(UO->getOpcode() == UO_Extension)(static_cast <bool> (UO->getOpcode() == UO_Extension ) ? void (0) : __assert_fail ("UO->getOpcode() == UO_Extension" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 160, __extension__ __PRETTY_FUNCTION__)); | ||||
161 | E = UO->getSubExpr(); | ||||
162 | } else if (GenericSelectionExpr *GSE = dyn_cast<GenericSelectionExpr>(E)) { | ||||
163 | E = GSE->getResultExpr(); | ||||
164 | } else if (ChooseExpr *CE = dyn_cast<ChooseExpr>(E)) { | ||||
165 | E = CE->getChosenSubExpr(); | ||||
166 | } else { | ||||
167 | llvm_unreachable("unexpected expr in string literal init")::llvm::llvm_unreachable_internal("unexpected expr in string literal init" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 167); | ||||
168 | } | ||||
169 | } | ||||
170 | } | ||||
171 | |||||
172 | /// Fix a compound literal initializing an array so it's correctly marked | ||||
173 | /// as an rvalue. | ||||
174 | static void updateGNUCompoundLiteralRValue(Expr *E) { | ||||
175 | while (true) { | ||||
176 | E->setValueKind(VK_PRValue); | ||||
177 | if (isa<CompoundLiteralExpr>(E)) { | ||||
178 | break; | ||||
179 | } else if (ParenExpr *PE = dyn_cast<ParenExpr>(E)) { | ||||
180 | E = PE->getSubExpr(); | ||||
181 | } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) { | ||||
182 | assert(UO->getOpcode() == UO_Extension)(static_cast <bool> (UO->getOpcode() == UO_Extension ) ? void (0) : __assert_fail ("UO->getOpcode() == UO_Extension" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 182, __extension__ __PRETTY_FUNCTION__)); | ||||
183 | E = UO->getSubExpr(); | ||||
184 | } else if (GenericSelectionExpr *GSE = dyn_cast<GenericSelectionExpr>(E)) { | ||||
185 | E = GSE->getResultExpr(); | ||||
186 | } else if (ChooseExpr *CE = dyn_cast<ChooseExpr>(E)) { | ||||
187 | E = CE->getChosenSubExpr(); | ||||
188 | } else { | ||||
189 | llvm_unreachable("unexpected expr in array compound literal init")::llvm::llvm_unreachable_internal("unexpected expr in array compound literal init" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 189); | ||||
190 | } | ||||
191 | } | ||||
192 | } | ||||
193 | |||||
194 | static void CheckStringInit(Expr *Str, QualType &DeclT, const ArrayType *AT, | ||||
195 | Sema &S) { | ||||
196 | // Get the length of the string as parsed. | ||||
197 | auto *ConstantArrayTy = | ||||
198 | cast<ConstantArrayType>(Str->getType()->getAsArrayTypeUnsafe()); | ||||
199 | uint64_t StrLength = ConstantArrayTy->getSize().getZExtValue(); | ||||
200 | |||||
201 | if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { | ||||
202 | // C99 6.7.8p14. We have an array of character type with unknown size | ||||
203 | // being initialized to a string literal. | ||||
204 | llvm::APInt ConstVal(32, StrLength); | ||||
205 | // Return a new array type (C99 6.7.8p22). | ||||
206 | DeclT = S.Context.getConstantArrayType(IAT->getElementType(), | ||||
207 | ConstVal, nullptr, | ||||
208 | ArrayType::Normal, 0); | ||||
209 | updateStringLiteralType(Str, DeclT); | ||||
210 | return; | ||||
211 | } | ||||
212 | |||||
213 | const ConstantArrayType *CAT = cast<ConstantArrayType>(AT); | ||||
214 | |||||
215 | // We have an array of character type with known size. However, | ||||
216 | // the size may be smaller or larger than the string we are initializing. | ||||
217 | // FIXME: Avoid truncation for 64-bit length strings. | ||||
218 | if (S.getLangOpts().CPlusPlus) { | ||||
219 | if (StringLiteral *SL = dyn_cast<StringLiteral>(Str->IgnoreParens())) { | ||||
220 | // For Pascal strings it's OK to strip off the terminating null character, | ||||
221 | // so the example below is valid: | ||||
222 | // | ||||
223 | // unsigned char a[2] = "\pa"; | ||||
224 | if (SL->isPascal()) | ||||
225 | StrLength--; | ||||
226 | } | ||||
227 | |||||
228 | // [dcl.init.string]p2 | ||||
229 | if (StrLength > CAT->getSize().getZExtValue()) | ||||
230 | S.Diag(Str->getBeginLoc(), | ||||
231 | diag::err_initializer_string_for_char_array_too_long) | ||||
232 | << Str->getSourceRange(); | ||||
233 | } else { | ||||
234 | // C99 6.7.8p14. | ||||
235 | if (StrLength-1 > CAT->getSize().getZExtValue()) | ||||
236 | S.Diag(Str->getBeginLoc(), | ||||
237 | diag::ext_initializer_string_for_char_array_too_long) | ||||
238 | << Str->getSourceRange(); | ||||
239 | } | ||||
240 | |||||
241 | // Set the type to the actual size that we are initializing. If we have | ||||
242 | // something like: | ||||
243 | // char x[1] = "foo"; | ||||
244 | // then this will set the string literal's type to char[1]. | ||||
245 | updateStringLiteralType(Str, DeclT); | ||||
246 | } | ||||
247 | |||||
248 | //===----------------------------------------------------------------------===// | ||||
249 | // Semantic checking for initializer lists. | ||||
250 | //===----------------------------------------------------------------------===// | ||||
251 | |||||
252 | namespace { | ||||
253 | |||||
254 | /// Semantic checking for initializer lists. | ||||
255 | /// | ||||
256 | /// The InitListChecker class contains a set of routines that each | ||||
257 | /// handle the initialization of a certain kind of entity, e.g., | ||||
258 | /// arrays, vectors, struct/union types, scalars, etc. The | ||||
259 | /// InitListChecker itself performs a recursive walk of the subobject | ||||
260 | /// structure of the type to be initialized, while stepping through | ||||
261 | /// the initializer list one element at a time. The IList and Index | ||||
262 | /// parameters to each of the Check* routines contain the active | ||||
263 | /// (syntactic) initializer list and the index into that initializer | ||||
264 | /// list that represents the current initializer. Each routine is | ||||
265 | /// responsible for moving that Index forward as it consumes elements. | ||||
266 | /// | ||||
267 | /// Each Check* routine also has a StructuredList/StructuredIndex | ||||
268 | /// arguments, which contains the current "structured" (semantic) | ||||
269 | /// initializer list and the index into that initializer list where we | ||||
270 | /// are copying initializers as we map them over to the semantic | ||||
271 | /// list. Once we have completed our recursive walk of the subobject | ||||
272 | /// structure, we will have constructed a full semantic initializer | ||||
273 | /// list. | ||||
274 | /// | ||||
275 | /// C99 designators cause changes in the initializer list traversal, | ||||
276 | /// because they make the initialization "jump" into a specific | ||||
277 | /// subobject and then continue the initialization from that | ||||
278 | /// point. CheckDesignatedInitializer() recursively steps into the | ||||
279 | /// designated subobject and manages backing out the recursion to | ||||
280 | /// initialize the subobjects after the one designated. | ||||
281 | /// | ||||
282 | /// If an initializer list contains any designators, we build a placeholder | ||||
283 | /// structured list even in 'verify only' mode, so that we can track which | ||||
284 | /// elements need 'empty' initializtion. | ||||
285 | class InitListChecker { | ||||
286 | Sema &SemaRef; | ||||
287 | bool hadError = false; | ||||
288 | bool VerifyOnly; // No diagnostics. | ||||
289 | bool TreatUnavailableAsInvalid; // Used only in VerifyOnly mode. | ||||
290 | bool InOverloadResolution; | ||||
291 | InitListExpr *FullyStructuredList = nullptr; | ||||
292 | NoInitExpr *DummyExpr = nullptr; | ||||
293 | |||||
294 | NoInitExpr *getDummyInit() { | ||||
295 | if (!DummyExpr) | ||||
296 | DummyExpr = new (SemaRef.Context) NoInitExpr(SemaRef.Context.VoidTy); | ||||
297 | return DummyExpr; | ||||
298 | } | ||||
299 | |||||
300 | void CheckImplicitInitList(const InitializedEntity &Entity, | ||||
301 | InitListExpr *ParentIList, QualType T, | ||||
302 | unsigned &Index, InitListExpr *StructuredList, | ||||
303 | unsigned &StructuredIndex); | ||||
304 | void CheckExplicitInitList(const InitializedEntity &Entity, | ||||
305 | InitListExpr *IList, QualType &T, | ||||
306 | InitListExpr *StructuredList, | ||||
307 | bool TopLevelObject = false); | ||||
308 | void CheckListElementTypes(const InitializedEntity &Entity, | ||||
309 | InitListExpr *IList, QualType &DeclType, | ||||
310 | bool SubobjectIsDesignatorContext, | ||||
311 | unsigned &Index, | ||||
312 | InitListExpr *StructuredList, | ||||
313 | unsigned &StructuredIndex, | ||||
314 | bool TopLevelObject = false); | ||||
315 | void CheckSubElementType(const InitializedEntity &Entity, | ||||
316 | InitListExpr *IList, QualType ElemType, | ||||
317 | unsigned &Index, | ||||
318 | InitListExpr *StructuredList, | ||||
319 | unsigned &StructuredIndex, | ||||
320 | bool DirectlyDesignated = false); | ||||
321 | void CheckComplexType(const InitializedEntity &Entity, | ||||
322 | InitListExpr *IList, QualType DeclType, | ||||
323 | unsigned &Index, | ||||
324 | InitListExpr *StructuredList, | ||||
325 | unsigned &StructuredIndex); | ||||
326 | void CheckScalarType(const InitializedEntity &Entity, | ||||
327 | InitListExpr *IList, QualType DeclType, | ||||
328 | unsigned &Index, | ||||
329 | InitListExpr *StructuredList, | ||||
330 | unsigned &StructuredIndex); | ||||
331 | void CheckReferenceType(const InitializedEntity &Entity, | ||||
332 | InitListExpr *IList, QualType DeclType, | ||||
333 | unsigned &Index, | ||||
334 | InitListExpr *StructuredList, | ||||
335 | unsigned &StructuredIndex); | ||||
336 | void CheckVectorType(const InitializedEntity &Entity, | ||||
337 | InitListExpr *IList, QualType DeclType, unsigned &Index, | ||||
338 | InitListExpr *StructuredList, | ||||
339 | unsigned &StructuredIndex); | ||||
340 | void CheckStructUnionTypes(const InitializedEntity &Entity, | ||||
341 | InitListExpr *IList, QualType DeclType, | ||||
342 | CXXRecordDecl::base_class_range Bases, | ||||
343 | RecordDecl::field_iterator Field, | ||||
344 | bool SubobjectIsDesignatorContext, unsigned &Index, | ||||
345 | InitListExpr *StructuredList, | ||||
346 | unsigned &StructuredIndex, | ||||
347 | bool TopLevelObject = false); | ||||
348 | void CheckArrayType(const InitializedEntity &Entity, | ||||
349 | InitListExpr *IList, QualType &DeclType, | ||||
350 | llvm::APSInt elementIndex, | ||||
351 | bool SubobjectIsDesignatorContext, unsigned &Index, | ||||
352 | InitListExpr *StructuredList, | ||||
353 | unsigned &StructuredIndex); | ||||
354 | bool CheckDesignatedInitializer(const InitializedEntity &Entity, | ||||
355 | InitListExpr *IList, DesignatedInitExpr *DIE, | ||||
356 | unsigned DesigIdx, | ||||
357 | QualType &CurrentObjectType, | ||||
358 | RecordDecl::field_iterator *NextField, | ||||
359 | llvm::APSInt *NextElementIndex, | ||||
360 | unsigned &Index, | ||||
361 | InitListExpr *StructuredList, | ||||
362 | unsigned &StructuredIndex, | ||||
363 | bool FinishSubobjectInit, | ||||
364 | bool TopLevelObject); | ||||
365 | InitListExpr *getStructuredSubobjectInit(InitListExpr *IList, unsigned Index, | ||||
366 | QualType CurrentObjectType, | ||||
367 | InitListExpr *StructuredList, | ||||
368 | unsigned StructuredIndex, | ||||
369 | SourceRange InitRange, | ||||
370 | bool IsFullyOverwritten = false); | ||||
371 | void UpdateStructuredListElement(InitListExpr *StructuredList, | ||||
372 | unsigned &StructuredIndex, | ||||
373 | Expr *expr); | ||||
374 | InitListExpr *createInitListExpr(QualType CurrentObjectType, | ||||
375 | SourceRange InitRange, | ||||
376 | unsigned ExpectedNumInits); | ||||
377 | int numArrayElements(QualType DeclType); | ||||
378 | int numStructUnionElements(QualType DeclType); | ||||
379 | |||||
380 | ExprResult PerformEmptyInit(SourceLocation Loc, | ||||
381 | const InitializedEntity &Entity); | ||||
382 | |||||
383 | /// Diagnose that OldInit (or part thereof) has been overridden by NewInit. | ||||
384 | void diagnoseInitOverride(Expr *OldInit, SourceRange NewInitRange, | ||||
385 | bool FullyOverwritten = true) { | ||||
386 | // Overriding an initializer via a designator is valid with C99 designated | ||||
387 | // initializers, but ill-formed with C++20 designated initializers. | ||||
388 | unsigned DiagID = SemaRef.getLangOpts().CPlusPlus | ||||
389 | ? diag::ext_initializer_overrides | ||||
390 | : diag::warn_initializer_overrides; | ||||
391 | |||||
392 | if (InOverloadResolution && SemaRef.getLangOpts().CPlusPlus) { | ||||
393 | // In overload resolution, we have to strictly enforce the rules, and so | ||||
394 | // don't allow any overriding of prior initializers. This matters for a | ||||
395 | // case such as: | ||||
396 | // | ||||
397 | // union U { int a, b; }; | ||||
398 | // struct S { int a, b; }; | ||||
399 | // void f(U), f(S); | ||||
400 | // | ||||
401 | // Here, f({.a = 1, .b = 2}) is required to call the struct overload. For | ||||
402 | // consistency, we disallow all overriding of prior initializers in | ||||
403 | // overload resolution, not only overriding of union members. | ||||
404 | hadError = true; | ||||
405 | } else if (OldInit->getType().isDestructedType() && !FullyOverwritten) { | ||||
406 | // If we'll be keeping around the old initializer but overwriting part of | ||||
407 | // the object it initialized, and that object is not trivially | ||||
408 | // destructible, this can leak. Don't allow that, not even as an | ||||
409 | // extension. | ||||
410 | // | ||||
411 | // FIXME: It might be reasonable to allow this in cases where the part of | ||||
412 | // the initializer that we're overriding has trivial destruction. | ||||
413 | DiagID = diag::err_initializer_overrides_destructed; | ||||
414 | } else if (!OldInit->getSourceRange().isValid()) { | ||||
415 | // We need to check on source range validity because the previous | ||||
416 | // initializer does not have to be an explicit initializer. e.g., | ||||
417 | // | ||||
418 | // struct P { int a, b; }; | ||||
419 | // struct PP { struct P p } l = { { .a = 2 }, .p.b = 3 }; | ||||
420 | // | ||||
421 | // There is an overwrite taking place because the first braced initializer | ||||
422 | // list "{ .a = 2 }" already provides value for .p.b (which is zero). | ||||
423 | // | ||||
424 | // Such overwrites are harmless, so we don't diagnose them. (Note that in | ||||
425 | // C++, this cannot be reached unless we've already seen and diagnosed a | ||||
426 | // different conformance issue, such as a mixture of designated and | ||||
427 | // non-designated initializers or a multi-level designator.) | ||||
428 | return; | ||||
429 | } | ||||
430 | |||||
431 | if (!VerifyOnly) { | ||||
432 | SemaRef.Diag(NewInitRange.getBegin(), DiagID) | ||||
433 | << NewInitRange << FullyOverwritten << OldInit->getType(); | ||||
434 | SemaRef.Diag(OldInit->getBeginLoc(), diag::note_previous_initializer) | ||||
435 | << (OldInit->HasSideEffects(SemaRef.Context) && FullyOverwritten) | ||||
436 | << OldInit->getSourceRange(); | ||||
437 | } | ||||
438 | } | ||||
439 | |||||
440 | // Explanation on the "FillWithNoInit" mode: | ||||
441 | // | ||||
442 | // Assume we have the following definitions (Case#1): | ||||
443 | // struct P { char x[6][6]; } xp = { .x[1] = "bar" }; | ||||
444 | // struct PP { struct P lp; } l = { .lp = xp, .lp.x[1][2] = 'f' }; | ||||
445 | // | ||||
446 | // l.lp.x[1][0..1] should not be filled with implicit initializers because the | ||||
447 | // "base" initializer "xp" will provide values for them; l.lp.x[1] will be "baf". | ||||
448 | // | ||||
449 | // But if we have (Case#2): | ||||
450 | // struct PP l = { .lp = xp, .lp.x[1] = { [2] = 'f' } }; | ||||
451 | // | ||||
452 | // l.lp.x[1][0..1] are implicitly initialized and do not use values from the | ||||
453 | // "base" initializer; l.lp.x[1] will be "\0\0f\0\0\0". | ||||
454 | // | ||||
455 | // To distinguish Case#1 from Case#2, and also to avoid leaving many "holes" | ||||
456 | // in the InitListExpr, the "holes" in Case#1 are filled not with empty | ||||
457 | // initializers but with special "NoInitExpr" place holders, which tells the | ||||
458 | // CodeGen not to generate any initializers for these parts. | ||||
459 | void FillInEmptyInitForBase(unsigned Init, const CXXBaseSpecifier &Base, | ||||
460 | const InitializedEntity &ParentEntity, | ||||
461 | InitListExpr *ILE, bool &RequiresSecondPass, | ||||
462 | bool FillWithNoInit); | ||||
463 | void FillInEmptyInitForField(unsigned Init, FieldDecl *Field, | ||||
464 | const InitializedEntity &ParentEntity, | ||||
465 | InitListExpr *ILE, bool &RequiresSecondPass, | ||||
466 | bool FillWithNoInit = false); | ||||
467 | void FillInEmptyInitializations(const InitializedEntity &Entity, | ||||
468 | InitListExpr *ILE, bool &RequiresSecondPass, | ||||
469 | InitListExpr *OuterILE, unsigned OuterIndex, | ||||
470 | bool FillWithNoInit = false); | ||||
471 | bool CheckFlexibleArrayInit(const InitializedEntity &Entity, | ||||
472 | Expr *InitExpr, FieldDecl *Field, | ||||
473 | bool TopLevelObject); | ||||
474 | void CheckEmptyInitializable(const InitializedEntity &Entity, | ||||
475 | SourceLocation Loc); | ||||
476 | |||||
477 | public: | ||||
478 | InitListChecker(Sema &S, const InitializedEntity &Entity, InitListExpr *IL, | ||||
479 | QualType &T, bool VerifyOnly, bool TreatUnavailableAsInvalid, | ||||
480 | bool InOverloadResolution = false); | ||||
481 | bool HadError() { return hadError; } | ||||
482 | |||||
483 | // Retrieves the fully-structured initializer list used for | ||||
484 | // semantic analysis and code generation. | ||||
485 | InitListExpr *getFullyStructuredList() const { return FullyStructuredList; } | ||||
486 | }; | ||||
487 | |||||
488 | } // end anonymous namespace | ||||
489 | |||||
490 | ExprResult InitListChecker::PerformEmptyInit(SourceLocation Loc, | ||||
491 | const InitializedEntity &Entity) { | ||||
492 | InitializationKind Kind = InitializationKind::CreateValue(Loc, Loc, Loc, | ||||
493 | true); | ||||
494 | MultiExprArg SubInit; | ||||
495 | Expr *InitExpr; | ||||
496 | InitListExpr DummyInitList(SemaRef.Context, Loc, None, Loc); | ||||
497 | |||||
498 | // C++ [dcl.init.aggr]p7: | ||||
499 | // If there are fewer initializer-clauses in the list than there are | ||||
500 | // members in the aggregate, then each member not explicitly initialized | ||||
501 | // ... | ||||
502 | bool EmptyInitList = SemaRef.getLangOpts().CPlusPlus11 && | ||||
503 | Entity.getType()->getBaseElementTypeUnsafe()->isRecordType(); | ||||
504 | if (EmptyInitList) { | ||||
505 | // C++1y / DR1070: | ||||
506 | // shall be initialized [...] from an empty initializer list. | ||||
507 | // | ||||
508 | // We apply the resolution of this DR to C++11 but not C++98, since C++98 | ||||
509 | // does not have useful semantics for initialization from an init list. | ||||
510 | // We treat this as copy-initialization, because aggregate initialization | ||||
511 | // always performs copy-initialization on its elements. | ||||
512 | // | ||||
513 | // Only do this if we're initializing a class type, to avoid filling in | ||||
514 | // the initializer list where possible. | ||||
515 | InitExpr = VerifyOnly ? &DummyInitList : new (SemaRef.Context) | ||||
516 | InitListExpr(SemaRef.Context, Loc, None, Loc); | ||||
517 | InitExpr->setType(SemaRef.Context.VoidTy); | ||||
518 | SubInit = InitExpr; | ||||
519 | Kind = InitializationKind::CreateCopy(Loc, Loc); | ||||
520 | } else { | ||||
521 | // C++03: | ||||
522 | // shall be value-initialized. | ||||
523 | } | ||||
524 | |||||
525 | InitializationSequence InitSeq(SemaRef, Entity, Kind, SubInit); | ||||
526 | // libstdc++4.6 marks the vector default constructor as explicit in | ||||
527 | // _GLIBCXX_DEBUG mode, so recover using the C++03 logic in that case. | ||||
528 | // stlport does so too. Look for std::__debug for libstdc++, and for | ||||
529 | // std:: for stlport. This is effectively a compiler-side implementation of | ||||
530 | // LWG2193. | ||||
531 | if (!InitSeq && EmptyInitList && InitSeq.getFailureKind() == | ||||
532 | InitializationSequence::FK_ExplicitConstructor) { | ||||
533 | OverloadCandidateSet::iterator Best; | ||||
534 | OverloadingResult O = | ||||
535 | InitSeq.getFailedCandidateSet() | ||||
536 | .BestViableFunction(SemaRef, Kind.getLocation(), Best); | ||||
537 | (void)O; | ||||
538 | assert(O == OR_Success && "Inconsistent overload resolution")(static_cast <bool> (O == OR_Success && "Inconsistent overload resolution" ) ? void (0) : __assert_fail ("O == OR_Success && \"Inconsistent overload resolution\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 538, __extension__ __PRETTY_FUNCTION__)); | ||||
539 | CXXConstructorDecl *CtorDecl = cast<CXXConstructorDecl>(Best->Function); | ||||
540 | CXXRecordDecl *R = CtorDecl->getParent(); | ||||
541 | |||||
542 | if (CtorDecl->getMinRequiredArguments() == 0 && | ||||
543 | CtorDecl->isExplicit() && R->getDeclName() && | ||||
544 | SemaRef.SourceMgr.isInSystemHeader(CtorDecl->getLocation())) { | ||||
545 | bool IsInStd = false; | ||||
546 | for (NamespaceDecl *ND = dyn_cast<NamespaceDecl>(R->getDeclContext()); | ||||
547 | ND && !IsInStd; ND = dyn_cast<NamespaceDecl>(ND->getParent())) { | ||||
548 | if (SemaRef.getStdNamespace()->InEnclosingNamespaceSetOf(ND)) | ||||
549 | IsInStd = true; | ||||
550 | } | ||||
551 | |||||
552 | if (IsInStd && llvm::StringSwitch<bool>(R->getName()) | ||||
553 | .Cases("basic_string", "deque", "forward_list", true) | ||||
554 | .Cases("list", "map", "multimap", "multiset", true) | ||||
555 | .Cases("priority_queue", "queue", "set", "stack", true) | ||||
556 | .Cases("unordered_map", "unordered_set", "vector", true) | ||||
557 | .Default(false)) { | ||||
558 | InitSeq.InitializeFrom( | ||||
559 | SemaRef, Entity, | ||||
560 | InitializationKind::CreateValue(Loc, Loc, Loc, true), | ||||
561 | MultiExprArg(), /*TopLevelOfInitList=*/false, | ||||
562 | TreatUnavailableAsInvalid); | ||||
563 | // Emit a warning for this. System header warnings aren't shown | ||||
564 | // by default, but people working on system headers should see it. | ||||
565 | if (!VerifyOnly) { | ||||
566 | SemaRef.Diag(CtorDecl->getLocation(), | ||||
567 | diag::warn_invalid_initializer_from_system_header); | ||||
568 | if (Entity.getKind() == InitializedEntity::EK_Member) | ||||
569 | SemaRef.Diag(Entity.getDecl()->getLocation(), | ||||
570 | diag::note_used_in_initialization_here); | ||||
571 | else if (Entity.getKind() == InitializedEntity::EK_ArrayElement) | ||||
572 | SemaRef.Diag(Loc, diag::note_used_in_initialization_here); | ||||
573 | } | ||||
574 | } | ||||
575 | } | ||||
576 | } | ||||
577 | if (!InitSeq) { | ||||
578 | if (!VerifyOnly) { | ||||
579 | InitSeq.Diagnose(SemaRef, Entity, Kind, SubInit); | ||||
580 | if (Entity.getKind() == InitializedEntity::EK_Member) | ||||
581 | SemaRef.Diag(Entity.getDecl()->getLocation(), | ||||
582 | diag::note_in_omitted_aggregate_initializer) | ||||
583 | << /*field*/1 << Entity.getDecl(); | ||||
584 | else if (Entity.getKind() == InitializedEntity::EK_ArrayElement) { | ||||
585 | bool IsTrailingArrayNewMember = | ||||
586 | Entity.getParent() && | ||||
587 | Entity.getParent()->isVariableLengthArrayNew(); | ||||
588 | SemaRef.Diag(Loc, diag::note_in_omitted_aggregate_initializer) | ||||
589 | << (IsTrailingArrayNewMember ? 2 : /*array element*/0) | ||||
590 | << Entity.getElementIndex(); | ||||
591 | } | ||||
592 | } | ||||
593 | hadError = true; | ||||
594 | return ExprError(); | ||||
595 | } | ||||
596 | |||||
597 | return VerifyOnly ? ExprResult() | ||||
598 | : InitSeq.Perform(SemaRef, Entity, Kind, SubInit); | ||||
599 | } | ||||
600 | |||||
601 | void InitListChecker::CheckEmptyInitializable(const InitializedEntity &Entity, | ||||
602 | SourceLocation Loc) { | ||||
603 | // If we're building a fully-structured list, we'll check this at the end | ||||
604 | // once we know which elements are actually initialized. Otherwise, we know | ||||
605 | // that there are no designators so we can just check now. | ||||
606 | if (FullyStructuredList) | ||||
607 | return; | ||||
608 | PerformEmptyInit(Loc, Entity); | ||||
609 | } | ||||
610 | |||||
611 | void InitListChecker::FillInEmptyInitForBase( | ||||
612 | unsigned Init, const CXXBaseSpecifier &Base, | ||||
613 | const InitializedEntity &ParentEntity, InitListExpr *ILE, | ||||
614 | bool &RequiresSecondPass, bool FillWithNoInit) { | ||||
615 | InitializedEntity BaseEntity = InitializedEntity::InitializeBase( | ||||
616 | SemaRef.Context, &Base, false, &ParentEntity); | ||||
617 | |||||
618 | if (Init >= ILE->getNumInits() || !ILE->getInit(Init)) { | ||||
619 | ExprResult BaseInit = FillWithNoInit | ||||
620 | ? new (SemaRef.Context) NoInitExpr(Base.getType()) | ||||
621 | : PerformEmptyInit(ILE->getEndLoc(), BaseEntity); | ||||
622 | if (BaseInit.isInvalid()) { | ||||
623 | hadError = true; | ||||
624 | return; | ||||
625 | } | ||||
626 | |||||
627 | if (!VerifyOnly) { | ||||
628 | assert(Init < ILE->getNumInits() && "should have been expanded")(static_cast <bool> (Init < ILE->getNumInits() && "should have been expanded") ? void (0) : __assert_fail ("Init < ILE->getNumInits() && \"should have been expanded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 628, __extension__ __PRETTY_FUNCTION__)); | ||||
629 | ILE->setInit(Init, BaseInit.getAs<Expr>()); | ||||
630 | } | ||||
631 | } else if (InitListExpr *InnerILE = | ||||
632 | dyn_cast<InitListExpr>(ILE->getInit(Init))) { | ||||
633 | FillInEmptyInitializations(BaseEntity, InnerILE, RequiresSecondPass, | ||||
634 | ILE, Init, FillWithNoInit); | ||||
635 | } else if (DesignatedInitUpdateExpr *InnerDIUE = | ||||
636 | dyn_cast<DesignatedInitUpdateExpr>(ILE->getInit(Init))) { | ||||
637 | FillInEmptyInitializations(BaseEntity, InnerDIUE->getUpdater(), | ||||
638 | RequiresSecondPass, ILE, Init, | ||||
639 | /*FillWithNoInit =*/true); | ||||
640 | } | ||||
641 | } | ||||
642 | |||||
643 | void InitListChecker::FillInEmptyInitForField(unsigned Init, FieldDecl *Field, | ||||
644 | const InitializedEntity &ParentEntity, | ||||
645 | InitListExpr *ILE, | ||||
646 | bool &RequiresSecondPass, | ||||
647 | bool FillWithNoInit) { | ||||
648 | SourceLocation Loc = ILE->getEndLoc(); | ||||
649 | unsigned NumInits = ILE->getNumInits(); | ||||
650 | InitializedEntity MemberEntity | ||||
651 | = InitializedEntity::InitializeMember(Field, &ParentEntity); | ||||
652 | |||||
653 | if (Init >= NumInits || !ILE->getInit(Init)) { | ||||
654 | if (const RecordType *RType = ILE->getType()->getAs<RecordType>()) | ||||
655 | if (!RType->getDecl()->isUnion()) | ||||
656 | assert((Init < NumInits || VerifyOnly) &&(static_cast <bool> ((Init < NumInits || VerifyOnly) && "This ILE should have been expanded") ? void (0) : __assert_fail ("(Init < NumInits || VerifyOnly) && \"This ILE should have been expanded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 657, __extension__ __PRETTY_FUNCTION__)) | ||||
657 | "This ILE should have been expanded")(static_cast <bool> ((Init < NumInits || VerifyOnly) && "This ILE should have been expanded") ? void (0) : __assert_fail ("(Init < NumInits || VerifyOnly) && \"This ILE should have been expanded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 657, __extension__ __PRETTY_FUNCTION__)); | ||||
658 | |||||
659 | if (FillWithNoInit) { | ||||
660 | assert(!VerifyOnly && "should not fill with no-init in verify-only mode")(static_cast <bool> (!VerifyOnly && "should not fill with no-init in verify-only mode" ) ? void (0) : __assert_fail ("!VerifyOnly && \"should not fill with no-init in verify-only mode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 660, __extension__ __PRETTY_FUNCTION__)); | ||||
661 | Expr *Filler = new (SemaRef.Context) NoInitExpr(Field->getType()); | ||||
662 | if (Init < NumInits) | ||||
663 | ILE->setInit(Init, Filler); | ||||
664 | else | ||||
665 | ILE->updateInit(SemaRef.Context, Init, Filler); | ||||
666 | return; | ||||
667 | } | ||||
668 | // C++1y [dcl.init.aggr]p7: | ||||
669 | // If there are fewer initializer-clauses in the list than there are | ||||
670 | // members in the aggregate, then each member not explicitly initialized | ||||
671 | // shall be initialized from its brace-or-equal-initializer [...] | ||||
672 | if (Field->hasInClassInitializer()) { | ||||
673 | if (VerifyOnly) | ||||
674 | return; | ||||
675 | |||||
676 | ExprResult DIE = SemaRef.BuildCXXDefaultInitExpr(Loc, Field); | ||||
677 | if (DIE.isInvalid()) { | ||||
678 | hadError = true; | ||||
679 | return; | ||||
680 | } | ||||
681 | SemaRef.checkInitializerLifetime(MemberEntity, DIE.get()); | ||||
682 | if (Init < NumInits) | ||||
683 | ILE->setInit(Init, DIE.get()); | ||||
684 | else { | ||||
685 | ILE->updateInit(SemaRef.Context, Init, DIE.get()); | ||||
686 | RequiresSecondPass = true; | ||||
687 | } | ||||
688 | return; | ||||
689 | } | ||||
690 | |||||
691 | if (Field->getType()->isReferenceType()) { | ||||
692 | if (!VerifyOnly) { | ||||
693 | // C++ [dcl.init.aggr]p9: | ||||
694 | // If an incomplete or empty initializer-list leaves a | ||||
695 | // member of reference type uninitialized, the program is | ||||
696 | // ill-formed. | ||||
697 | SemaRef.Diag(Loc, diag::err_init_reference_member_uninitialized) | ||||
698 | << Field->getType() | ||||
699 | << ILE->getSyntacticForm()->getSourceRange(); | ||||
700 | SemaRef.Diag(Field->getLocation(), | ||||
701 | diag::note_uninit_reference_member); | ||||
702 | } | ||||
703 | hadError = true; | ||||
704 | return; | ||||
705 | } | ||||
706 | |||||
707 | ExprResult MemberInit = PerformEmptyInit(Loc, MemberEntity); | ||||
708 | if (MemberInit.isInvalid()) { | ||||
709 | hadError = true; | ||||
710 | return; | ||||
711 | } | ||||
712 | |||||
713 | if (hadError || VerifyOnly) { | ||||
714 | // Do nothing | ||||
715 | } else if (Init < NumInits) { | ||||
716 | ILE->setInit(Init, MemberInit.getAs<Expr>()); | ||||
717 | } else if (!isa<ImplicitValueInitExpr>(MemberInit.get())) { | ||||
718 | // Empty initialization requires a constructor call, so | ||||
719 | // extend the initializer list to include the constructor | ||||
720 | // call and make a note that we'll need to take another pass | ||||
721 | // through the initializer list. | ||||
722 | ILE->updateInit(SemaRef.Context, Init, MemberInit.getAs<Expr>()); | ||||
723 | RequiresSecondPass = true; | ||||
724 | } | ||||
725 | } else if (InitListExpr *InnerILE | ||||
726 | = dyn_cast<InitListExpr>(ILE->getInit(Init))) { | ||||
727 | FillInEmptyInitializations(MemberEntity, InnerILE, | ||||
728 | RequiresSecondPass, ILE, Init, FillWithNoInit); | ||||
729 | } else if (DesignatedInitUpdateExpr *InnerDIUE = | ||||
730 | dyn_cast<DesignatedInitUpdateExpr>(ILE->getInit(Init))) { | ||||
731 | FillInEmptyInitializations(MemberEntity, InnerDIUE->getUpdater(), | ||||
732 | RequiresSecondPass, ILE, Init, | ||||
733 | /*FillWithNoInit =*/true); | ||||
734 | } | ||||
735 | } | ||||
736 | |||||
737 | /// Recursively replaces NULL values within the given initializer list | ||||
738 | /// with expressions that perform value-initialization of the | ||||
739 | /// appropriate type, and finish off the InitListExpr formation. | ||||
740 | void | ||||
741 | InitListChecker::FillInEmptyInitializations(const InitializedEntity &Entity, | ||||
742 | InitListExpr *ILE, | ||||
743 | bool &RequiresSecondPass, | ||||
744 | InitListExpr *OuterILE, | ||||
745 | unsigned OuterIndex, | ||||
746 | bool FillWithNoInit) { | ||||
747 | assert((ILE->getType() != SemaRef.Context.VoidTy) &&(static_cast <bool> ((ILE->getType() != SemaRef.Context .VoidTy) && "Should not have void type") ? void (0) : __assert_fail ("(ILE->getType() != SemaRef.Context.VoidTy) && \"Should not have void type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 748, __extension__ __PRETTY_FUNCTION__)) | ||||
748 | "Should not have void type")(static_cast <bool> ((ILE->getType() != SemaRef.Context .VoidTy) && "Should not have void type") ? void (0) : __assert_fail ("(ILE->getType() != SemaRef.Context.VoidTy) && \"Should not have void type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 748, __extension__ __PRETTY_FUNCTION__)); | ||||
749 | |||||
750 | // We don't need to do any checks when just filling NoInitExprs; that can't | ||||
751 | // fail. | ||||
752 | if (FillWithNoInit && VerifyOnly) | ||||
753 | return; | ||||
754 | |||||
755 | // If this is a nested initializer list, we might have changed its contents | ||||
756 | // (and therefore some of its properties, such as instantiation-dependence) | ||||
757 | // while filling it in. Inform the outer initializer list so that its state | ||||
758 | // can be updated to match. | ||||
759 | // FIXME: We should fully build the inner initializers before constructing | ||||
760 | // the outer InitListExpr instead of mutating AST nodes after they have | ||||
761 | // been used as subexpressions of other nodes. | ||||
762 | struct UpdateOuterILEWithUpdatedInit { | ||||
763 | InitListExpr *Outer; | ||||
764 | unsigned OuterIndex; | ||||
765 | ~UpdateOuterILEWithUpdatedInit() { | ||||
766 | if (Outer) | ||||
767 | Outer->setInit(OuterIndex, Outer->getInit(OuterIndex)); | ||||
768 | } | ||||
769 | } UpdateOuterRAII = {OuterILE, OuterIndex}; | ||||
770 | |||||
771 | // A transparent ILE is not performing aggregate initialization and should | ||||
772 | // not be filled in. | ||||
773 | if (ILE->isTransparent()) | ||||
774 | return; | ||||
775 | |||||
776 | if (const RecordType *RType = ILE->getType()->getAs<RecordType>()) { | ||||
777 | const RecordDecl *RDecl = RType->getDecl(); | ||||
778 | if (RDecl->isUnion() && ILE->getInitializedFieldInUnion()) | ||||
779 | FillInEmptyInitForField(0, ILE->getInitializedFieldInUnion(), | ||||
780 | Entity, ILE, RequiresSecondPass, FillWithNoInit); | ||||
781 | else if (RDecl->isUnion() && isa<CXXRecordDecl>(RDecl) && | ||||
782 | cast<CXXRecordDecl>(RDecl)->hasInClassInitializer()) { | ||||
783 | for (auto *Field : RDecl->fields()) { | ||||
784 | if (Field->hasInClassInitializer()) { | ||||
785 | FillInEmptyInitForField(0, Field, Entity, ILE, RequiresSecondPass, | ||||
786 | FillWithNoInit); | ||||
787 | break; | ||||
788 | } | ||||
789 | } | ||||
790 | } else { | ||||
791 | // The fields beyond ILE->getNumInits() are default initialized, so in | ||||
792 | // order to leave them uninitialized, the ILE is expanded and the extra | ||||
793 | // fields are then filled with NoInitExpr. | ||||
794 | unsigned NumElems = numStructUnionElements(ILE->getType()); | ||||
795 | if (RDecl->hasFlexibleArrayMember()) | ||||
796 | ++NumElems; | ||||
797 | if (!VerifyOnly && ILE->getNumInits() < NumElems) | ||||
798 | ILE->resizeInits(SemaRef.Context, NumElems); | ||||
799 | |||||
800 | unsigned Init = 0; | ||||
801 | |||||
802 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RDecl)) { | ||||
803 | for (auto &Base : CXXRD->bases()) { | ||||
804 | if (hadError) | ||||
805 | return; | ||||
806 | |||||
807 | FillInEmptyInitForBase(Init, Base, Entity, ILE, RequiresSecondPass, | ||||
808 | FillWithNoInit); | ||||
809 | ++Init; | ||||
810 | } | ||||
811 | } | ||||
812 | |||||
813 | for (auto *Field : RDecl->fields()) { | ||||
814 | if (Field->isUnnamedBitfield()) | ||||
815 | continue; | ||||
816 | |||||
817 | if (hadError) | ||||
818 | return; | ||||
819 | |||||
820 | FillInEmptyInitForField(Init, Field, Entity, ILE, RequiresSecondPass, | ||||
821 | FillWithNoInit); | ||||
822 | if (hadError) | ||||
823 | return; | ||||
824 | |||||
825 | ++Init; | ||||
826 | |||||
827 | // Only look at the first initialization of a union. | ||||
828 | if (RDecl->isUnion()) | ||||
829 | break; | ||||
830 | } | ||||
831 | } | ||||
832 | |||||
833 | return; | ||||
834 | } | ||||
835 | |||||
836 | QualType ElementType; | ||||
837 | |||||
838 | InitializedEntity ElementEntity = Entity; | ||||
839 | unsigned NumInits = ILE->getNumInits(); | ||||
840 | unsigned NumElements = NumInits; | ||||
841 | if (const ArrayType *AType = SemaRef.Context.getAsArrayType(ILE->getType())) { | ||||
842 | ElementType = AType->getElementType(); | ||||
843 | if (const auto *CAType = dyn_cast<ConstantArrayType>(AType)) | ||||
844 | NumElements = CAType->getSize().getZExtValue(); | ||||
845 | // For an array new with an unknown bound, ask for one additional element | ||||
846 | // in order to populate the array filler. | ||||
847 | if (Entity.isVariableLengthArrayNew()) | ||||
848 | ++NumElements; | ||||
849 | ElementEntity = InitializedEntity::InitializeElement(SemaRef.Context, | ||||
850 | 0, Entity); | ||||
851 | } else if (const VectorType *VType = ILE->getType()->getAs<VectorType>()) { | ||||
852 | ElementType = VType->getElementType(); | ||||
853 | NumElements = VType->getNumElements(); | ||||
854 | ElementEntity = InitializedEntity::InitializeElement(SemaRef.Context, | ||||
855 | 0, Entity); | ||||
856 | } else | ||||
857 | ElementType = ILE->getType(); | ||||
858 | |||||
859 | bool SkipEmptyInitChecks = false; | ||||
860 | for (unsigned Init = 0; Init != NumElements; ++Init) { | ||||
861 | if (hadError) | ||||
862 | return; | ||||
863 | |||||
864 | if (ElementEntity.getKind() == InitializedEntity::EK_ArrayElement || | ||||
865 | ElementEntity.getKind() == InitializedEntity::EK_VectorElement) | ||||
866 | ElementEntity.setElementIndex(Init); | ||||
867 | |||||
868 | if (Init >= NumInits && (ILE->hasArrayFiller() || SkipEmptyInitChecks)) | ||||
869 | return; | ||||
870 | |||||
871 | Expr *InitExpr = (Init < NumInits ? ILE->getInit(Init) : nullptr); | ||||
872 | if (!InitExpr && Init < NumInits && ILE->hasArrayFiller()) | ||||
873 | ILE->setInit(Init, ILE->getArrayFiller()); | ||||
874 | else if (!InitExpr && !ILE->hasArrayFiller()) { | ||||
875 | // In VerifyOnly mode, there's no point performing empty initialization | ||||
876 | // more than once. | ||||
877 | if (SkipEmptyInitChecks) | ||||
878 | continue; | ||||
879 | |||||
880 | Expr *Filler = nullptr; | ||||
881 | |||||
882 | if (FillWithNoInit) | ||||
883 | Filler = new (SemaRef.Context) NoInitExpr(ElementType); | ||||
884 | else { | ||||
885 | ExprResult ElementInit = | ||||
886 | PerformEmptyInit(ILE->getEndLoc(), ElementEntity); | ||||
887 | if (ElementInit.isInvalid()) { | ||||
888 | hadError = true; | ||||
889 | return; | ||||
890 | } | ||||
891 | |||||
892 | Filler = ElementInit.getAs<Expr>(); | ||||
893 | } | ||||
894 | |||||
895 | if (hadError) { | ||||
896 | // Do nothing | ||||
897 | } else if (VerifyOnly) { | ||||
898 | SkipEmptyInitChecks = true; | ||||
899 | } else if (Init < NumInits) { | ||||
900 | // For arrays, just set the expression used for value-initialization | ||||
901 | // of the "holes" in the array. | ||||
902 | if (ElementEntity.getKind() == InitializedEntity::EK_ArrayElement) | ||||
903 | ILE->setArrayFiller(Filler); | ||||
904 | else | ||||
905 | ILE->setInit(Init, Filler); | ||||
906 | } else { | ||||
907 | // For arrays, just set the expression used for value-initialization | ||||
908 | // of the rest of elements and exit. | ||||
909 | if (ElementEntity.getKind() == InitializedEntity::EK_ArrayElement) { | ||||
910 | ILE->setArrayFiller(Filler); | ||||
911 | return; | ||||
912 | } | ||||
913 | |||||
914 | if (!isa<ImplicitValueInitExpr>(Filler) && !isa<NoInitExpr>(Filler)) { | ||||
915 | // Empty initialization requires a constructor call, so | ||||
916 | // extend the initializer list to include the constructor | ||||
917 | // call and make a note that we'll need to take another pass | ||||
918 | // through the initializer list. | ||||
919 | ILE->updateInit(SemaRef.Context, Init, Filler); | ||||
920 | RequiresSecondPass = true; | ||||
921 | } | ||||
922 | } | ||||
923 | } else if (InitListExpr *InnerILE | ||||
924 | = dyn_cast_or_null<InitListExpr>(InitExpr)) { | ||||
925 | FillInEmptyInitializations(ElementEntity, InnerILE, RequiresSecondPass, | ||||
926 | ILE, Init, FillWithNoInit); | ||||
927 | } else if (DesignatedInitUpdateExpr *InnerDIUE = | ||||
928 | dyn_cast_or_null<DesignatedInitUpdateExpr>(InitExpr)) { | ||||
929 | FillInEmptyInitializations(ElementEntity, InnerDIUE->getUpdater(), | ||||
930 | RequiresSecondPass, ILE, Init, | ||||
931 | /*FillWithNoInit =*/true); | ||||
932 | } | ||||
933 | } | ||||
934 | } | ||||
935 | |||||
936 | static bool hasAnyDesignatedInits(const InitListExpr *IL) { | ||||
937 | for (const Stmt *Init : *IL) | ||||
938 | if (Init && isa<DesignatedInitExpr>(Init)) | ||||
939 | return true; | ||||
940 | return false; | ||||
941 | } | ||||
942 | |||||
943 | InitListChecker::InitListChecker(Sema &S, const InitializedEntity &Entity, | ||||
944 | InitListExpr *IL, QualType &T, bool VerifyOnly, | ||||
945 | bool TreatUnavailableAsInvalid, | ||||
946 | bool InOverloadResolution) | ||||
947 | : SemaRef(S), VerifyOnly(VerifyOnly), | ||||
948 | TreatUnavailableAsInvalid(TreatUnavailableAsInvalid), | ||||
949 | InOverloadResolution(InOverloadResolution) { | ||||
950 | if (!VerifyOnly || hasAnyDesignatedInits(IL)) { | ||||
951 | FullyStructuredList = | ||||
952 | createInitListExpr(T, IL->getSourceRange(), IL->getNumInits()); | ||||
953 | |||||
954 | // FIXME: Check that IL isn't already the semantic form of some other | ||||
955 | // InitListExpr. If it is, we'd create a broken AST. | ||||
956 | if (!VerifyOnly) | ||||
957 | FullyStructuredList->setSyntacticForm(IL); | ||||
958 | } | ||||
959 | |||||
960 | CheckExplicitInitList(Entity, IL, T, FullyStructuredList, | ||||
961 | /*TopLevelObject=*/true); | ||||
962 | |||||
963 | if (!hadError && FullyStructuredList) { | ||||
964 | bool RequiresSecondPass = false; | ||||
965 | FillInEmptyInitializations(Entity, FullyStructuredList, RequiresSecondPass, | ||||
966 | /*OuterILE=*/nullptr, /*OuterIndex=*/0); | ||||
967 | if (RequiresSecondPass && !hadError) | ||||
968 | FillInEmptyInitializations(Entity, FullyStructuredList, | ||||
969 | RequiresSecondPass, nullptr, 0); | ||||
970 | } | ||||
971 | if (hadError && FullyStructuredList) | ||||
972 | FullyStructuredList->markError(); | ||||
973 | } | ||||
974 | |||||
975 | int InitListChecker::numArrayElements(QualType DeclType) { | ||||
976 | // FIXME: use a proper constant | ||||
977 | int maxElements = 0x7FFFFFFF; | ||||
978 | if (const ConstantArrayType *CAT = | ||||
979 | SemaRef.Context.getAsConstantArrayType(DeclType)) { | ||||
980 | maxElements = static_cast<int>(CAT->getSize().getZExtValue()); | ||||
981 | } | ||||
982 | return maxElements; | ||||
983 | } | ||||
984 | |||||
985 | int InitListChecker::numStructUnionElements(QualType DeclType) { | ||||
986 | RecordDecl *structDecl = DeclType->castAs<RecordType>()->getDecl(); | ||||
987 | int InitializableMembers = 0; | ||||
988 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(structDecl)) | ||||
989 | InitializableMembers += CXXRD->getNumBases(); | ||||
990 | for (const auto *Field : structDecl->fields()) | ||||
991 | if (!Field->isUnnamedBitfield()) | ||||
992 | ++InitializableMembers; | ||||
993 | |||||
994 | if (structDecl->isUnion()) | ||||
995 | return std::min(InitializableMembers, 1); | ||||
996 | return InitializableMembers - structDecl->hasFlexibleArrayMember(); | ||||
997 | } | ||||
998 | |||||
999 | /// Determine whether Entity is an entity for which it is idiomatic to elide | ||||
1000 | /// the braces in aggregate initialization. | ||||
1001 | static bool isIdiomaticBraceElisionEntity(const InitializedEntity &Entity) { | ||||
1002 | // Recursive initialization of the one and only field within an aggregate | ||||
1003 | // class is considered idiomatic. This case arises in particular for | ||||
1004 | // initialization of std::array, where the C++ standard suggests the idiom of | ||||
1005 | // | ||||
1006 | // std::array<T, N> arr = {1, 2, 3}; | ||||
1007 | // | ||||
1008 | // (where std::array is an aggregate struct containing a single array field. | ||||
1009 | |||||
1010 | if (!Entity.getParent()) | ||||
1011 | return false; | ||||
1012 | |||||
1013 | // Allows elide brace initialization for aggregates with empty base. | ||||
1014 | if (Entity.getKind() == InitializedEntity::EK_Base) { | ||||
1015 | auto *ParentRD = | ||||
1016 | Entity.getParent()->getType()->castAs<RecordType>()->getDecl(); | ||||
1017 | CXXRecordDecl *CXXRD = cast<CXXRecordDecl>(ParentRD); | ||||
1018 | return CXXRD->getNumBases() == 1 && CXXRD->field_empty(); | ||||
1019 | } | ||||
1020 | |||||
1021 | // Allow brace elision if the only subobject is a field. | ||||
1022 | if (Entity.getKind() == InitializedEntity::EK_Member) { | ||||
1023 | auto *ParentRD = | ||||
1024 | Entity.getParent()->getType()->castAs<RecordType>()->getDecl(); | ||||
1025 | if (CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(ParentRD)) { | ||||
1026 | if (CXXRD->getNumBases()) { | ||||
1027 | return false; | ||||
1028 | } | ||||
1029 | } | ||||
1030 | auto FieldIt = ParentRD->field_begin(); | ||||
1031 | assert(FieldIt != ParentRD->field_end() &&(static_cast <bool> (FieldIt != ParentRD->field_end( ) && "no fields but have initializer for member?") ? void (0) : __assert_fail ("FieldIt != ParentRD->field_end() && \"no fields but have initializer for member?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1032, __extension__ __PRETTY_FUNCTION__)) | ||||
1032 | "no fields but have initializer for member?")(static_cast <bool> (FieldIt != ParentRD->field_end( ) && "no fields but have initializer for member?") ? void (0) : __assert_fail ("FieldIt != ParentRD->field_end() && \"no fields but have initializer for member?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1032, __extension__ __PRETTY_FUNCTION__)); | ||||
1033 | return ++FieldIt == ParentRD->field_end(); | ||||
1034 | } | ||||
1035 | |||||
1036 | return false; | ||||
1037 | } | ||||
1038 | |||||
1039 | /// Check whether the range of the initializer \p ParentIList from element | ||||
1040 | /// \p Index onwards can be used to initialize an object of type \p T. Update | ||||
1041 | /// \p Index to indicate how many elements of the list were consumed. | ||||
1042 | /// | ||||
1043 | /// This also fills in \p StructuredList, from element \p StructuredIndex | ||||
1044 | /// onwards, with the fully-braced, desugared form of the initialization. | ||||
1045 | void InitListChecker::CheckImplicitInitList(const InitializedEntity &Entity, | ||||
1046 | InitListExpr *ParentIList, | ||||
1047 | QualType T, unsigned &Index, | ||||
1048 | InitListExpr *StructuredList, | ||||
1049 | unsigned &StructuredIndex) { | ||||
1050 | int maxElements = 0; | ||||
1051 | |||||
1052 | if (T->isArrayType()) | ||||
1053 | maxElements = numArrayElements(T); | ||||
1054 | else if (T->isRecordType()) | ||||
1055 | maxElements = numStructUnionElements(T); | ||||
1056 | else if (T->isVectorType()) | ||||
1057 | maxElements = T->castAs<VectorType>()->getNumElements(); | ||||
1058 | else | ||||
1059 | llvm_unreachable("CheckImplicitInitList(): Illegal type")::llvm::llvm_unreachable_internal("CheckImplicitInitList(): Illegal type" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1059); | ||||
1060 | |||||
1061 | if (maxElements == 0) { | ||||
1062 | if (!VerifyOnly) | ||||
1063 | SemaRef.Diag(ParentIList->getInit(Index)->getBeginLoc(), | ||||
1064 | diag::err_implicit_empty_initializer); | ||||
1065 | ++Index; | ||||
1066 | hadError = true; | ||||
1067 | return; | ||||
1068 | } | ||||
1069 | |||||
1070 | // Build a structured initializer list corresponding to this subobject. | ||||
1071 | InitListExpr *StructuredSubobjectInitList = getStructuredSubobjectInit( | ||||
1072 | ParentIList, Index, T, StructuredList, StructuredIndex, | ||||
1073 | SourceRange(ParentIList->getInit(Index)->getBeginLoc(), | ||||
1074 | ParentIList->getSourceRange().getEnd())); | ||||
1075 | unsigned StructuredSubobjectInitIndex = 0; | ||||
1076 | |||||
1077 | // Check the element types and build the structural subobject. | ||||
1078 | unsigned StartIndex = Index; | ||||
1079 | CheckListElementTypes(Entity, ParentIList, T, | ||||
1080 | /*SubobjectIsDesignatorContext=*/false, Index, | ||||
1081 | StructuredSubobjectInitList, | ||||
1082 | StructuredSubobjectInitIndex); | ||||
1083 | |||||
1084 | if (StructuredSubobjectInitList) { | ||||
1085 | StructuredSubobjectInitList->setType(T); | ||||
1086 | |||||
1087 | unsigned EndIndex = (Index == StartIndex? StartIndex : Index - 1); | ||||
1088 | // Update the structured sub-object initializer so that it's ending | ||||
1089 | // range corresponds with the end of the last initializer it used. | ||||
1090 | if (EndIndex < ParentIList->getNumInits() && | ||||
1091 | ParentIList->getInit(EndIndex)) { | ||||
1092 | SourceLocation EndLoc | ||||
1093 | = ParentIList->getInit(EndIndex)->getSourceRange().getEnd(); | ||||
1094 | StructuredSubobjectInitList->setRBraceLoc(EndLoc); | ||||
1095 | } | ||||
1096 | |||||
1097 | // Complain about missing braces. | ||||
1098 | if (!VerifyOnly && (T->isArrayType() || T->isRecordType()) && | ||||
1099 | !ParentIList->isIdiomaticZeroInitializer(SemaRef.getLangOpts()) && | ||||
1100 | !isIdiomaticBraceElisionEntity(Entity)) { | ||||
1101 | SemaRef.Diag(StructuredSubobjectInitList->getBeginLoc(), | ||||
1102 | diag::warn_missing_braces) | ||||
1103 | << StructuredSubobjectInitList->getSourceRange() | ||||
1104 | << FixItHint::CreateInsertion( | ||||
1105 | StructuredSubobjectInitList->getBeginLoc(), "{") | ||||
1106 | << FixItHint::CreateInsertion( | ||||
1107 | SemaRef.getLocForEndOfToken( | ||||
1108 | StructuredSubobjectInitList->getEndLoc()), | ||||
1109 | "}"); | ||||
1110 | } | ||||
1111 | |||||
1112 | // Warn if this type won't be an aggregate in future versions of C++. | ||||
1113 | auto *CXXRD = T->getAsCXXRecordDecl(); | ||||
1114 | if (!VerifyOnly && CXXRD && CXXRD->hasUserDeclaredConstructor()) { | ||||
1115 | SemaRef.Diag(StructuredSubobjectInitList->getBeginLoc(), | ||||
1116 | diag::warn_cxx20_compat_aggregate_init_with_ctors) | ||||
1117 | << StructuredSubobjectInitList->getSourceRange() << T; | ||||
1118 | } | ||||
1119 | } | ||||
1120 | } | ||||
1121 | |||||
1122 | /// Warn that \p Entity was of scalar type and was initialized by a | ||||
1123 | /// single-element braced initializer list. | ||||
1124 | static void warnBracedScalarInit(Sema &S, const InitializedEntity &Entity, | ||||
1125 | SourceRange Braces) { | ||||
1126 | // Don't warn during template instantiation. If the initialization was | ||||
1127 | // non-dependent, we warned during the initial parse; otherwise, the | ||||
1128 | // type might not be scalar in some uses of the template. | ||||
1129 | if (S.inTemplateInstantiation()) | ||||
1130 | return; | ||||
1131 | |||||
1132 | unsigned DiagID = 0; | ||||
1133 | |||||
1134 | switch (Entity.getKind()) { | ||||
1135 | case InitializedEntity::EK_VectorElement: | ||||
1136 | case InitializedEntity::EK_ComplexElement: | ||||
1137 | case InitializedEntity::EK_ArrayElement: | ||||
1138 | case InitializedEntity::EK_Parameter: | ||||
1139 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||
1140 | case InitializedEntity::EK_TemplateParameter: | ||||
1141 | case InitializedEntity::EK_Result: | ||||
1142 | // Extra braces here are suspicious. | ||||
1143 | DiagID = diag::warn_braces_around_init; | ||||
1144 | break; | ||||
1145 | |||||
1146 | case InitializedEntity::EK_Member: | ||||
1147 | // Warn on aggregate initialization but not on ctor init list or | ||||
1148 | // default member initializer. | ||||
1149 | if (Entity.getParent()) | ||||
1150 | DiagID = diag::warn_braces_around_init; | ||||
1151 | break; | ||||
1152 | |||||
1153 | case InitializedEntity::EK_Variable: | ||||
1154 | case InitializedEntity::EK_LambdaCapture: | ||||
1155 | // No warning, might be direct-list-initialization. | ||||
1156 | // FIXME: Should we warn for copy-list-initialization in these cases? | ||||
1157 | break; | ||||
1158 | |||||
1159 | case InitializedEntity::EK_New: | ||||
1160 | case InitializedEntity::EK_Temporary: | ||||
1161 | case InitializedEntity::EK_CompoundLiteralInit: | ||||
1162 | // No warning, braces are part of the syntax of the underlying construct. | ||||
1163 | break; | ||||
1164 | |||||
1165 | case InitializedEntity::EK_RelatedResult: | ||||
1166 | // No warning, we already warned when initializing the result. | ||||
1167 | break; | ||||
1168 | |||||
1169 | case InitializedEntity::EK_Exception: | ||||
1170 | case InitializedEntity::EK_Base: | ||||
1171 | case InitializedEntity::EK_Delegating: | ||||
1172 | case InitializedEntity::EK_BlockElement: | ||||
1173 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||
1174 | case InitializedEntity::EK_Binding: | ||||
1175 | case InitializedEntity::EK_StmtExprResult: | ||||
1176 | llvm_unreachable("unexpected braced scalar init")::llvm::llvm_unreachable_internal("unexpected braced scalar init" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1176); | ||||
1177 | } | ||||
1178 | |||||
1179 | if (DiagID) { | ||||
1180 | S.Diag(Braces.getBegin(), DiagID) | ||||
1181 | << Entity.getType()->isSizelessBuiltinType() << Braces | ||||
1182 | << FixItHint::CreateRemoval(Braces.getBegin()) | ||||
1183 | << FixItHint::CreateRemoval(Braces.getEnd()); | ||||
1184 | } | ||||
1185 | } | ||||
1186 | |||||
1187 | /// Check whether the initializer \p IList (that was written with explicit | ||||
1188 | /// braces) can be used to initialize an object of type \p T. | ||||
1189 | /// | ||||
1190 | /// This also fills in \p StructuredList with the fully-braced, desugared | ||||
1191 | /// form of the initialization. | ||||
1192 | void InitListChecker::CheckExplicitInitList(const InitializedEntity &Entity, | ||||
1193 | InitListExpr *IList, QualType &T, | ||||
1194 | InitListExpr *StructuredList, | ||||
1195 | bool TopLevelObject) { | ||||
1196 | unsigned Index = 0, StructuredIndex = 0; | ||||
1197 | CheckListElementTypes(Entity, IList, T, /*SubobjectIsDesignatorContext=*/true, | ||||
1198 | Index, StructuredList, StructuredIndex, TopLevelObject); | ||||
1199 | if (StructuredList) { | ||||
1200 | QualType ExprTy = T; | ||||
1201 | if (!ExprTy->isArrayType()) | ||||
1202 | ExprTy = ExprTy.getNonLValueExprType(SemaRef.Context); | ||||
1203 | if (!VerifyOnly) | ||||
1204 | IList->setType(ExprTy); | ||||
1205 | StructuredList->setType(ExprTy); | ||||
1206 | } | ||||
1207 | if (hadError) | ||||
1208 | return; | ||||
1209 | |||||
1210 | // Don't complain for incomplete types, since we'll get an error elsewhere. | ||||
1211 | if (Index < IList->getNumInits() && !T->isIncompleteType()) { | ||||
1212 | // We have leftover initializers | ||||
1213 | bool ExtraInitsIsError = SemaRef.getLangOpts().CPlusPlus || | ||||
1214 | (SemaRef.getLangOpts().OpenCL && T->isVectorType()); | ||||
1215 | hadError = ExtraInitsIsError; | ||||
1216 | if (VerifyOnly) { | ||||
1217 | return; | ||||
1218 | } else if (StructuredIndex == 1 && | ||||
1219 | IsStringInit(StructuredList->getInit(0), T, SemaRef.Context) == | ||||
1220 | SIF_None) { | ||||
1221 | unsigned DK = | ||||
1222 | ExtraInitsIsError | ||||
1223 | ? diag::err_excess_initializers_in_char_array_initializer | ||||
1224 | : diag::ext_excess_initializers_in_char_array_initializer; | ||||
1225 | SemaRef.Diag(IList->getInit(Index)->getBeginLoc(), DK) | ||||
1226 | << IList->getInit(Index)->getSourceRange(); | ||||
1227 | } else if (T->isSizelessBuiltinType()) { | ||||
1228 | unsigned DK = ExtraInitsIsError | ||||
1229 | ? diag::err_excess_initializers_for_sizeless_type | ||||
1230 | : diag::ext_excess_initializers_for_sizeless_type; | ||||
1231 | SemaRef.Diag(IList->getInit(Index)->getBeginLoc(), DK) | ||||
1232 | << T << IList->getInit(Index)->getSourceRange(); | ||||
1233 | } else { | ||||
1234 | int initKind = T->isArrayType() ? 0 : | ||||
1235 | T->isVectorType() ? 1 : | ||||
1236 | T->isScalarType() ? 2 : | ||||
1237 | T->isUnionType() ? 3 : | ||||
1238 | 4; | ||||
1239 | |||||
1240 | unsigned DK = ExtraInitsIsError ? diag::err_excess_initializers | ||||
1241 | : diag::ext_excess_initializers; | ||||
1242 | SemaRef.Diag(IList->getInit(Index)->getBeginLoc(), DK) | ||||
1243 | << initKind << IList->getInit(Index)->getSourceRange(); | ||||
1244 | } | ||||
1245 | } | ||||
1246 | |||||
1247 | if (!VerifyOnly) { | ||||
1248 | if (T->isScalarType() && IList->getNumInits() == 1 && | ||||
1249 | !isa<InitListExpr>(IList->getInit(0))) | ||||
1250 | warnBracedScalarInit(SemaRef, Entity, IList->getSourceRange()); | ||||
1251 | |||||
1252 | // Warn if this is a class type that won't be an aggregate in future | ||||
1253 | // versions of C++. | ||||
1254 | auto *CXXRD = T->getAsCXXRecordDecl(); | ||||
1255 | if (CXXRD && CXXRD->hasUserDeclaredConstructor()) { | ||||
1256 | // Don't warn if there's an equivalent default constructor that would be | ||||
1257 | // used instead. | ||||
1258 | bool HasEquivCtor = false; | ||||
1259 | if (IList->getNumInits() == 0) { | ||||
1260 | auto *CD = SemaRef.LookupDefaultConstructor(CXXRD); | ||||
1261 | HasEquivCtor = CD && !CD->isDeleted(); | ||||
1262 | } | ||||
1263 | |||||
1264 | if (!HasEquivCtor) { | ||||
1265 | SemaRef.Diag(IList->getBeginLoc(), | ||||
1266 | diag::warn_cxx20_compat_aggregate_init_with_ctors) | ||||
1267 | << IList->getSourceRange() << T; | ||||
1268 | } | ||||
1269 | } | ||||
1270 | } | ||||
1271 | } | ||||
1272 | |||||
1273 | void InitListChecker::CheckListElementTypes(const InitializedEntity &Entity, | ||||
1274 | InitListExpr *IList, | ||||
1275 | QualType &DeclType, | ||||
1276 | bool SubobjectIsDesignatorContext, | ||||
1277 | unsigned &Index, | ||||
1278 | InitListExpr *StructuredList, | ||||
1279 | unsigned &StructuredIndex, | ||||
1280 | bool TopLevelObject) { | ||||
1281 | if (DeclType->isAnyComplexType() && SubobjectIsDesignatorContext) { | ||||
1282 | // Explicitly braced initializer for complex type can be real+imaginary | ||||
1283 | // parts. | ||||
1284 | CheckComplexType(Entity, IList, DeclType, Index, | ||||
1285 | StructuredList, StructuredIndex); | ||||
1286 | } else if (DeclType->isScalarType()) { | ||||
1287 | CheckScalarType(Entity, IList, DeclType, Index, | ||||
1288 | StructuredList, StructuredIndex); | ||||
1289 | } else if (DeclType->isVectorType()) { | ||||
1290 | CheckVectorType(Entity, IList, DeclType, Index, | ||||
1291 | StructuredList, StructuredIndex); | ||||
1292 | } else if (DeclType->isRecordType()) { | ||||
1293 | assert(DeclType->isAggregateType() &&(static_cast <bool> (DeclType->isAggregateType() && "non-aggregate records should be handed in CheckSubElementType" ) ? void (0) : __assert_fail ("DeclType->isAggregateType() && \"non-aggregate records should be handed in CheckSubElementType\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1294, __extension__ __PRETTY_FUNCTION__)) | ||||
1294 | "non-aggregate records should be handed in CheckSubElementType")(static_cast <bool> (DeclType->isAggregateType() && "non-aggregate records should be handed in CheckSubElementType" ) ? void (0) : __assert_fail ("DeclType->isAggregateType() && \"non-aggregate records should be handed in CheckSubElementType\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1294, __extension__ __PRETTY_FUNCTION__)); | ||||
1295 | RecordDecl *RD = DeclType->castAs<RecordType>()->getDecl(); | ||||
1296 | auto Bases = | ||||
1297 | CXXRecordDecl::base_class_range(CXXRecordDecl::base_class_iterator(), | ||||
1298 | CXXRecordDecl::base_class_iterator()); | ||||
1299 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD)) | ||||
1300 | Bases = CXXRD->bases(); | ||||
1301 | CheckStructUnionTypes(Entity, IList, DeclType, Bases, RD->field_begin(), | ||||
1302 | SubobjectIsDesignatorContext, Index, StructuredList, | ||||
1303 | StructuredIndex, TopLevelObject); | ||||
1304 | } else if (DeclType->isArrayType()) { | ||||
1305 | llvm::APSInt Zero( | ||||
1306 | SemaRef.Context.getTypeSize(SemaRef.Context.getSizeType()), | ||||
1307 | false); | ||||
1308 | CheckArrayType(Entity, IList, DeclType, Zero, | ||||
1309 | SubobjectIsDesignatorContext, Index, | ||||
1310 | StructuredList, StructuredIndex); | ||||
1311 | } else if (DeclType->isVoidType() || DeclType->isFunctionType()) { | ||||
1312 | // This type is invalid, issue a diagnostic. | ||||
1313 | ++Index; | ||||
1314 | if (!VerifyOnly) | ||||
1315 | SemaRef.Diag(IList->getBeginLoc(), diag::err_illegal_initializer_type) | ||||
1316 | << DeclType; | ||||
1317 | hadError = true; | ||||
1318 | } else if (DeclType->isReferenceType()) { | ||||
1319 | CheckReferenceType(Entity, IList, DeclType, Index, | ||||
1320 | StructuredList, StructuredIndex); | ||||
1321 | } else if (DeclType->isObjCObjectType()) { | ||||
1322 | if (!VerifyOnly) | ||||
1323 | SemaRef.Diag(IList->getBeginLoc(), diag::err_init_objc_class) << DeclType; | ||||
1324 | hadError = true; | ||||
1325 | } else if (DeclType->isOCLIntelSubgroupAVCType() || | ||||
1326 | DeclType->isSizelessBuiltinType()) { | ||||
1327 | // Checks for scalar type are sufficient for these types too. | ||||
1328 | CheckScalarType(Entity, IList, DeclType, Index, StructuredList, | ||||
1329 | StructuredIndex); | ||||
1330 | } else { | ||||
1331 | if (!VerifyOnly) | ||||
1332 | SemaRef.Diag(IList->getBeginLoc(), diag::err_illegal_initializer_type) | ||||
1333 | << DeclType; | ||||
1334 | hadError = true; | ||||
1335 | } | ||||
1336 | } | ||||
1337 | |||||
1338 | void InitListChecker::CheckSubElementType(const InitializedEntity &Entity, | ||||
1339 | InitListExpr *IList, | ||||
1340 | QualType ElemType, | ||||
1341 | unsigned &Index, | ||||
1342 | InitListExpr *StructuredList, | ||||
1343 | unsigned &StructuredIndex, | ||||
1344 | bool DirectlyDesignated) { | ||||
1345 | Expr *expr = IList->getInit(Index); | ||||
1346 | |||||
1347 | if (ElemType->isReferenceType()) | ||||
1348 | return CheckReferenceType(Entity, IList, ElemType, Index, | ||||
1349 | StructuredList, StructuredIndex); | ||||
1350 | |||||
1351 | if (InitListExpr *SubInitList = dyn_cast<InitListExpr>(expr)) { | ||||
1352 | if (SubInitList->getNumInits() == 1 && | ||||
1353 | IsStringInit(SubInitList->getInit(0), ElemType, SemaRef.Context) == | ||||
1354 | SIF_None) { | ||||
1355 | // FIXME: It would be more faithful and no less correct to include an | ||||
1356 | // InitListExpr in the semantic form of the initializer list in this case. | ||||
1357 | expr = SubInitList->getInit(0); | ||||
1358 | } | ||||
1359 | // Nested aggregate initialization and C++ initialization are handled later. | ||||
1360 | } else if (isa<ImplicitValueInitExpr>(expr)) { | ||||
1361 | // This happens during template instantiation when we see an InitListExpr | ||||
1362 | // that we've already checked once. | ||||
1363 | assert(SemaRef.Context.hasSameType(expr->getType(), ElemType) &&(static_cast <bool> (SemaRef.Context.hasSameType(expr-> getType(), ElemType) && "found implicit initialization for the wrong type" ) ? void (0) : __assert_fail ("SemaRef.Context.hasSameType(expr->getType(), ElemType) && \"found implicit initialization for the wrong type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1364, __extension__ __PRETTY_FUNCTION__)) | ||||
1364 | "found implicit initialization for the wrong type")(static_cast <bool> (SemaRef.Context.hasSameType(expr-> getType(), ElemType) && "found implicit initialization for the wrong type" ) ? void (0) : __assert_fail ("SemaRef.Context.hasSameType(expr->getType(), ElemType) && \"found implicit initialization for the wrong type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1364, __extension__ __PRETTY_FUNCTION__)); | ||||
1365 | UpdateStructuredListElement(StructuredList, StructuredIndex, expr); | ||||
1366 | ++Index; | ||||
1367 | return; | ||||
1368 | } | ||||
1369 | |||||
1370 | if (SemaRef.getLangOpts().CPlusPlus || isa<InitListExpr>(expr)) { | ||||
1371 | // C++ [dcl.init.aggr]p2: | ||||
1372 | // Each member is copy-initialized from the corresponding | ||||
1373 | // initializer-clause. | ||||
1374 | |||||
1375 | // FIXME: Better EqualLoc? | ||||
1376 | InitializationKind Kind = | ||||
1377 | InitializationKind::CreateCopy(expr->getBeginLoc(), SourceLocation()); | ||||
1378 | |||||
1379 | // Vector elements can be initialized from other vectors in which case | ||||
1380 | // we need initialization entity with a type of a vector (and not a vector | ||||
1381 | // element!) initializing multiple vector elements. | ||||
1382 | auto TmpEntity = | ||||
1383 | (ElemType->isExtVectorType() && !Entity.getType()->isExtVectorType()) | ||||
1384 | ? InitializedEntity::InitializeTemporary(ElemType) | ||||
1385 | : Entity; | ||||
1386 | |||||
1387 | InitializationSequence Seq(SemaRef, TmpEntity, Kind, expr, | ||||
1388 | /*TopLevelOfInitList*/ true); | ||||
1389 | |||||
1390 | // C++14 [dcl.init.aggr]p13: | ||||
1391 | // If the assignment-expression can initialize a member, the member is | ||||
1392 | // initialized. Otherwise [...] brace elision is assumed | ||||
1393 | // | ||||
1394 | // Brace elision is never performed if the element is not an | ||||
1395 | // assignment-expression. | ||||
1396 | if (Seq || isa<InitListExpr>(expr)) { | ||||
1397 | if (!VerifyOnly) { | ||||
1398 | ExprResult Result = Seq.Perform(SemaRef, TmpEntity, Kind, expr); | ||||
1399 | if (Result.isInvalid()) | ||||
1400 | hadError = true; | ||||
1401 | |||||
1402 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||
1403 | Result.getAs<Expr>()); | ||||
1404 | } else if (!Seq) { | ||||
1405 | hadError = true; | ||||
1406 | } else if (StructuredList) { | ||||
1407 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||
1408 | getDummyInit()); | ||||
1409 | } | ||||
1410 | ++Index; | ||||
1411 | return; | ||||
1412 | } | ||||
1413 | |||||
1414 | // Fall through for subaggregate initialization | ||||
1415 | } else if (ElemType->isScalarType() || ElemType->isAtomicType()) { | ||||
1416 | // FIXME: Need to handle atomic aggregate types with implicit init lists. | ||||
1417 | return CheckScalarType(Entity, IList, ElemType, Index, | ||||
1418 | StructuredList, StructuredIndex); | ||||
1419 | } else if (const ArrayType *arrayType = | ||||
1420 | SemaRef.Context.getAsArrayType(ElemType)) { | ||||
1421 | // arrayType can be incomplete if we're initializing a flexible | ||||
1422 | // array member. There's nothing we can do with the completed | ||||
1423 | // type here, though. | ||||
1424 | |||||
1425 | if (IsStringInit(expr, arrayType, SemaRef.Context) == SIF_None) { | ||||
1426 | // FIXME: Should we do this checking in verify-only mode? | ||||
1427 | if (!VerifyOnly) | ||||
1428 | CheckStringInit(expr, ElemType, arrayType, SemaRef); | ||||
1429 | if (StructuredList) | ||||
1430 | UpdateStructuredListElement(StructuredList, StructuredIndex, expr); | ||||
1431 | ++Index; | ||||
1432 | return; | ||||
1433 | } | ||||
1434 | |||||
1435 | // Fall through for subaggregate initialization. | ||||
1436 | |||||
1437 | } else { | ||||
1438 | assert((ElemType->isRecordType() || ElemType->isVectorType() ||(static_cast <bool> ((ElemType->isRecordType() || ElemType ->isVectorType() || ElemType->isOpenCLSpecificType()) && "Unexpected type") ? void (0) : __assert_fail ("(ElemType->isRecordType() || ElemType->isVectorType() || ElemType->isOpenCLSpecificType()) && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1439, __extension__ __PRETTY_FUNCTION__)) | ||||
1439 | ElemType->isOpenCLSpecificType()) && "Unexpected type")(static_cast <bool> ((ElemType->isRecordType() || ElemType ->isVectorType() || ElemType->isOpenCLSpecificType()) && "Unexpected type") ? void (0) : __assert_fail ("(ElemType->isRecordType() || ElemType->isVectorType() || ElemType->isOpenCLSpecificType()) && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1439, __extension__ __PRETTY_FUNCTION__)); | ||||
1440 | |||||
1441 | // C99 6.7.8p13: | ||||
1442 | // | ||||
1443 | // The initializer for a structure or union object that has | ||||
1444 | // automatic storage duration shall be either an initializer | ||||
1445 | // list as described below, or a single expression that has | ||||
1446 | // compatible structure or union type. In the latter case, the | ||||
1447 | // initial value of the object, including unnamed members, is | ||||
1448 | // that of the expression. | ||||
1449 | ExprResult ExprRes = expr; | ||||
1450 | if (SemaRef.CheckSingleAssignmentConstraints( | ||||
1451 | ElemType, ExprRes, !VerifyOnly) != Sema::Incompatible) { | ||||
1452 | if (ExprRes.isInvalid()) | ||||
1453 | hadError = true; | ||||
1454 | else { | ||||
1455 | ExprRes = SemaRef.DefaultFunctionArrayLvalueConversion(ExprRes.get()); | ||||
1456 | if (ExprRes.isInvalid()) | ||||
1457 | hadError = true; | ||||
1458 | } | ||||
1459 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||
1460 | ExprRes.getAs<Expr>()); | ||||
1461 | ++Index; | ||||
1462 | return; | ||||
1463 | } | ||||
1464 | ExprRes.get(); | ||||
1465 | // Fall through for subaggregate initialization | ||||
1466 | } | ||||
1467 | |||||
1468 | // C++ [dcl.init.aggr]p12: | ||||
1469 | // | ||||
1470 | // [...] Otherwise, if the member is itself a non-empty | ||||
1471 | // subaggregate, brace elision is assumed and the initializer is | ||||
1472 | // considered for the initialization of the first member of | ||||
1473 | // the subaggregate. | ||||
1474 | // OpenCL vector initializer is handled elsewhere. | ||||
1475 | if ((!SemaRef.getLangOpts().OpenCL && ElemType->isVectorType()) || | ||||
1476 | ElemType->isAggregateType()) { | ||||
1477 | CheckImplicitInitList(Entity, IList, ElemType, Index, StructuredList, | ||||
1478 | StructuredIndex); | ||||
1479 | ++StructuredIndex; | ||||
1480 | |||||
1481 | // In C++20, brace elision is not permitted for a designated initializer. | ||||
1482 | if (DirectlyDesignated && SemaRef.getLangOpts().CPlusPlus && !hadError) { | ||||
1483 | if (InOverloadResolution) | ||||
1484 | hadError = true; | ||||
1485 | if (!VerifyOnly) { | ||||
1486 | SemaRef.Diag(expr->getBeginLoc(), | ||||
1487 | diag::ext_designated_init_brace_elision) | ||||
1488 | << expr->getSourceRange() | ||||
1489 | << FixItHint::CreateInsertion(expr->getBeginLoc(), "{") | ||||
1490 | << FixItHint::CreateInsertion( | ||||
1491 | SemaRef.getLocForEndOfToken(expr->getEndLoc()), "}"); | ||||
1492 | } | ||||
1493 | } | ||||
1494 | } else { | ||||
1495 | if (!VerifyOnly) { | ||||
1496 | // We cannot initialize this element, so let PerformCopyInitialization | ||||
1497 | // produce the appropriate diagnostic. We already checked that this | ||||
1498 | // initialization will fail. | ||||
1499 | ExprResult Copy = | ||||
1500 | SemaRef.PerformCopyInitialization(Entity, SourceLocation(), expr, | ||||
1501 | /*TopLevelOfInitList=*/true); | ||||
1502 | (void)Copy; | ||||
1503 | assert(Copy.isInvalid() &&(static_cast <bool> (Copy.isInvalid() && "expected non-aggregate initialization to fail" ) ? void (0) : __assert_fail ("Copy.isInvalid() && \"expected non-aggregate initialization to fail\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1504, __extension__ __PRETTY_FUNCTION__)) | ||||
1504 | "expected non-aggregate initialization to fail")(static_cast <bool> (Copy.isInvalid() && "expected non-aggregate initialization to fail" ) ? void (0) : __assert_fail ("Copy.isInvalid() && \"expected non-aggregate initialization to fail\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1504, __extension__ __PRETTY_FUNCTION__)); | ||||
1505 | } | ||||
1506 | hadError = true; | ||||
1507 | ++Index; | ||||
1508 | ++StructuredIndex; | ||||
1509 | } | ||||
1510 | } | ||||
1511 | |||||
1512 | void InitListChecker::CheckComplexType(const InitializedEntity &Entity, | ||||
1513 | InitListExpr *IList, QualType DeclType, | ||||
1514 | unsigned &Index, | ||||
1515 | InitListExpr *StructuredList, | ||||
1516 | unsigned &StructuredIndex) { | ||||
1517 | assert(Index == 0 && "Index in explicit init list must be zero")(static_cast <bool> (Index == 0 && "Index in explicit init list must be zero" ) ? void (0) : __assert_fail ("Index == 0 && \"Index in explicit init list must be zero\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1517, __extension__ __PRETTY_FUNCTION__)); | ||||
1518 | |||||
1519 | // As an extension, clang supports complex initializers, which initialize | ||||
1520 | // a complex number component-wise. When an explicit initializer list for | ||||
1521 | // a complex number contains two two initializers, this extension kicks in: | ||||
1522 | // it exepcts the initializer list to contain two elements convertible to | ||||
1523 | // the element type of the complex type. The first element initializes | ||||
1524 | // the real part, and the second element intitializes the imaginary part. | ||||
1525 | |||||
1526 | if (IList->getNumInits() != 2) | ||||
1527 | return CheckScalarType(Entity, IList, DeclType, Index, StructuredList, | ||||
1528 | StructuredIndex); | ||||
1529 | |||||
1530 | // This is an extension in C. (The builtin _Complex type does not exist | ||||
1531 | // in the C++ standard.) | ||||
1532 | if (!SemaRef.getLangOpts().CPlusPlus && !VerifyOnly) | ||||
1533 | SemaRef.Diag(IList->getBeginLoc(), diag::ext_complex_component_init) | ||||
1534 | << IList->getSourceRange(); | ||||
1535 | |||||
1536 | // Initialize the complex number. | ||||
1537 | QualType elementType = DeclType->castAs<ComplexType>()->getElementType(); | ||||
1538 | InitializedEntity ElementEntity = | ||||
1539 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||
1540 | |||||
1541 | for (unsigned i = 0; i < 2; ++i) { | ||||
1542 | ElementEntity.setElementIndex(Index); | ||||
1543 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||
1544 | StructuredList, StructuredIndex); | ||||
1545 | } | ||||
1546 | } | ||||
1547 | |||||
1548 | void InitListChecker::CheckScalarType(const InitializedEntity &Entity, | ||||
1549 | InitListExpr *IList, QualType DeclType, | ||||
1550 | unsigned &Index, | ||||
1551 | InitListExpr *StructuredList, | ||||
1552 | unsigned &StructuredIndex) { | ||||
1553 | if (Index >= IList->getNumInits()) { | ||||
1554 | if (!VerifyOnly) { | ||||
1555 | if (DeclType->isSizelessBuiltinType()) | ||||
1556 | SemaRef.Diag(IList->getBeginLoc(), | ||||
1557 | SemaRef.getLangOpts().CPlusPlus11 | ||||
1558 | ? diag::warn_cxx98_compat_empty_sizeless_initializer | ||||
1559 | : diag::err_empty_sizeless_initializer) | ||||
1560 | << DeclType << IList->getSourceRange(); | ||||
1561 | else | ||||
1562 | SemaRef.Diag(IList->getBeginLoc(), | ||||
1563 | SemaRef.getLangOpts().CPlusPlus11 | ||||
1564 | ? diag::warn_cxx98_compat_empty_scalar_initializer | ||||
1565 | : diag::err_empty_scalar_initializer) | ||||
1566 | << IList->getSourceRange(); | ||||
1567 | } | ||||
1568 | hadError = !SemaRef.getLangOpts().CPlusPlus11; | ||||
1569 | ++Index; | ||||
1570 | ++StructuredIndex; | ||||
1571 | return; | ||||
1572 | } | ||||
1573 | |||||
1574 | Expr *expr = IList->getInit(Index); | ||||
1575 | if (InitListExpr *SubIList = dyn_cast<InitListExpr>(expr)) { | ||||
1576 | // FIXME: This is invalid, and accepting it causes overload resolution | ||||
1577 | // to pick the wrong overload in some corner cases. | ||||
1578 | if (!VerifyOnly) | ||||
1579 | SemaRef.Diag(SubIList->getBeginLoc(), diag::ext_many_braces_around_init) | ||||
1580 | << DeclType->isSizelessBuiltinType() << SubIList->getSourceRange(); | ||||
1581 | |||||
1582 | CheckScalarType(Entity, SubIList, DeclType, Index, StructuredList, | ||||
1583 | StructuredIndex); | ||||
1584 | return; | ||||
1585 | } else if (isa<DesignatedInitExpr>(expr)) { | ||||
1586 | if (!VerifyOnly) | ||||
1587 | SemaRef.Diag(expr->getBeginLoc(), | ||||
1588 | diag::err_designator_for_scalar_or_sizeless_init) | ||||
1589 | << DeclType->isSizelessBuiltinType() << DeclType | ||||
1590 | << expr->getSourceRange(); | ||||
1591 | hadError = true; | ||||
1592 | ++Index; | ||||
1593 | ++StructuredIndex; | ||||
1594 | return; | ||||
1595 | } | ||||
1596 | |||||
1597 | ExprResult Result; | ||||
1598 | if (VerifyOnly) { | ||||
1599 | if (SemaRef.CanPerformCopyInitialization(Entity, expr)) | ||||
1600 | Result = getDummyInit(); | ||||
1601 | else | ||||
1602 | Result = ExprError(); | ||||
1603 | } else { | ||||
1604 | Result = | ||||
1605 | SemaRef.PerformCopyInitialization(Entity, expr->getBeginLoc(), expr, | ||||
1606 | /*TopLevelOfInitList=*/true); | ||||
1607 | } | ||||
1608 | |||||
1609 | Expr *ResultExpr = nullptr; | ||||
1610 | |||||
1611 | if (Result.isInvalid()) | ||||
1612 | hadError = true; // types weren't compatible. | ||||
1613 | else { | ||||
1614 | ResultExpr = Result.getAs<Expr>(); | ||||
1615 | |||||
1616 | if (ResultExpr != expr && !VerifyOnly) { | ||||
1617 | // The type was promoted, update initializer list. | ||||
1618 | // FIXME: Why are we updating the syntactic init list? | ||||
1619 | IList->setInit(Index, ResultExpr); | ||||
1620 | } | ||||
1621 | } | ||||
1622 | UpdateStructuredListElement(StructuredList, StructuredIndex, ResultExpr); | ||||
1623 | ++Index; | ||||
1624 | } | ||||
1625 | |||||
1626 | void InitListChecker::CheckReferenceType(const InitializedEntity &Entity, | ||||
1627 | InitListExpr *IList, QualType DeclType, | ||||
1628 | unsigned &Index, | ||||
1629 | InitListExpr *StructuredList, | ||||
1630 | unsigned &StructuredIndex) { | ||||
1631 | if (Index >= IList->getNumInits()) { | ||||
1632 | // FIXME: It would be wonderful if we could point at the actual member. In | ||||
1633 | // general, it would be useful to pass location information down the stack, | ||||
1634 | // so that we know the location (or decl) of the "current object" being | ||||
1635 | // initialized. | ||||
1636 | if (!VerifyOnly) | ||||
1637 | SemaRef.Diag(IList->getBeginLoc(), | ||||
1638 | diag::err_init_reference_member_uninitialized) | ||||
1639 | << DeclType << IList->getSourceRange(); | ||||
1640 | hadError = true; | ||||
1641 | ++Index; | ||||
1642 | ++StructuredIndex; | ||||
1643 | return; | ||||
1644 | } | ||||
1645 | |||||
1646 | Expr *expr = IList->getInit(Index); | ||||
1647 | if (isa<InitListExpr>(expr) && !SemaRef.getLangOpts().CPlusPlus11) { | ||||
1648 | if (!VerifyOnly) | ||||
1649 | SemaRef.Diag(IList->getBeginLoc(), diag::err_init_non_aggr_init_list) | ||||
1650 | << DeclType << IList->getSourceRange(); | ||||
1651 | hadError = true; | ||||
1652 | ++Index; | ||||
1653 | ++StructuredIndex; | ||||
1654 | return; | ||||
1655 | } | ||||
1656 | |||||
1657 | ExprResult Result; | ||||
1658 | if (VerifyOnly) { | ||||
1659 | if (SemaRef.CanPerformCopyInitialization(Entity,expr)) | ||||
1660 | Result = getDummyInit(); | ||||
1661 | else | ||||
1662 | Result = ExprError(); | ||||
1663 | } else { | ||||
1664 | Result = | ||||
1665 | SemaRef.PerformCopyInitialization(Entity, expr->getBeginLoc(), expr, | ||||
1666 | /*TopLevelOfInitList=*/true); | ||||
1667 | } | ||||
1668 | |||||
1669 | if (Result.isInvalid()) | ||||
1670 | hadError = true; | ||||
1671 | |||||
1672 | expr = Result.getAs<Expr>(); | ||||
1673 | // FIXME: Why are we updating the syntactic init list? | ||||
1674 | if (!VerifyOnly && expr) | ||||
1675 | IList->setInit(Index, expr); | ||||
1676 | |||||
1677 | UpdateStructuredListElement(StructuredList, StructuredIndex, expr); | ||||
1678 | ++Index; | ||||
1679 | } | ||||
1680 | |||||
1681 | void InitListChecker::CheckVectorType(const InitializedEntity &Entity, | ||||
1682 | InitListExpr *IList, QualType DeclType, | ||||
1683 | unsigned &Index, | ||||
1684 | InitListExpr *StructuredList, | ||||
1685 | unsigned &StructuredIndex) { | ||||
1686 | const VectorType *VT = DeclType->castAs<VectorType>(); | ||||
1687 | unsigned maxElements = VT->getNumElements(); | ||||
1688 | unsigned numEltsInit = 0; | ||||
1689 | QualType elementType = VT->getElementType(); | ||||
1690 | |||||
1691 | if (Index >= IList->getNumInits()) { | ||||
1692 | // Make sure the element type can be value-initialized. | ||||
1693 | CheckEmptyInitializable( | ||||
1694 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity), | ||||
1695 | IList->getEndLoc()); | ||||
1696 | return; | ||||
1697 | } | ||||
1698 | |||||
1699 | if (!SemaRef.getLangOpts().OpenCL) { | ||||
1700 | // If the initializing element is a vector, try to copy-initialize | ||||
1701 | // instead of breaking it apart (which is doomed to failure anyway). | ||||
1702 | Expr *Init = IList->getInit(Index); | ||||
1703 | if (!isa<InitListExpr>(Init) && Init->getType()->isVectorType()) { | ||||
1704 | ExprResult Result; | ||||
1705 | if (VerifyOnly) { | ||||
1706 | if (SemaRef.CanPerformCopyInitialization(Entity, Init)) | ||||
1707 | Result = getDummyInit(); | ||||
1708 | else | ||||
1709 | Result = ExprError(); | ||||
1710 | } else { | ||||
1711 | Result = | ||||
1712 | SemaRef.PerformCopyInitialization(Entity, Init->getBeginLoc(), Init, | ||||
1713 | /*TopLevelOfInitList=*/true); | ||||
1714 | } | ||||
1715 | |||||
1716 | Expr *ResultExpr = nullptr; | ||||
1717 | if (Result.isInvalid()) | ||||
1718 | hadError = true; // types weren't compatible. | ||||
1719 | else { | ||||
1720 | ResultExpr = Result.getAs<Expr>(); | ||||
1721 | |||||
1722 | if (ResultExpr != Init && !VerifyOnly) { | ||||
1723 | // The type was promoted, update initializer list. | ||||
1724 | // FIXME: Why are we updating the syntactic init list? | ||||
1725 | IList->setInit(Index, ResultExpr); | ||||
1726 | } | ||||
1727 | } | ||||
1728 | UpdateStructuredListElement(StructuredList, StructuredIndex, ResultExpr); | ||||
1729 | ++Index; | ||||
1730 | return; | ||||
1731 | } | ||||
1732 | |||||
1733 | InitializedEntity ElementEntity = | ||||
1734 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||
1735 | |||||
1736 | for (unsigned i = 0; i < maxElements; ++i, ++numEltsInit) { | ||||
1737 | // Don't attempt to go past the end of the init list | ||||
1738 | if (Index >= IList->getNumInits()) { | ||||
1739 | CheckEmptyInitializable(ElementEntity, IList->getEndLoc()); | ||||
1740 | break; | ||||
1741 | } | ||||
1742 | |||||
1743 | ElementEntity.setElementIndex(Index); | ||||
1744 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||
1745 | StructuredList, StructuredIndex); | ||||
1746 | } | ||||
1747 | |||||
1748 | if (VerifyOnly) | ||||
1749 | return; | ||||
1750 | |||||
1751 | bool isBigEndian = SemaRef.Context.getTargetInfo().isBigEndian(); | ||||
1752 | const VectorType *T = Entity.getType()->castAs<VectorType>(); | ||||
1753 | if (isBigEndian && (T->getVectorKind() == VectorType::NeonVector || | ||||
1754 | T->getVectorKind() == VectorType::NeonPolyVector)) { | ||||
1755 | // The ability to use vector initializer lists is a GNU vector extension | ||||
1756 | // and is unrelated to the NEON intrinsics in arm_neon.h. On little | ||||
1757 | // endian machines it works fine, however on big endian machines it | ||||
1758 | // exhibits surprising behaviour: | ||||
1759 | // | ||||
1760 | // uint32x2_t x = {42, 64}; | ||||
1761 | // return vget_lane_u32(x, 0); // Will return 64. | ||||
1762 | // | ||||
1763 | // Because of this, explicitly call out that it is non-portable. | ||||
1764 | // | ||||
1765 | SemaRef.Diag(IList->getBeginLoc(), | ||||
1766 | diag::warn_neon_vector_initializer_non_portable); | ||||
1767 | |||||
1768 | const char *typeCode; | ||||
1769 | unsigned typeSize = SemaRef.Context.getTypeSize(elementType); | ||||
1770 | |||||
1771 | if (elementType->isFloatingType()) | ||||
1772 | typeCode = "f"; | ||||
1773 | else if (elementType->isSignedIntegerType()) | ||||
1774 | typeCode = "s"; | ||||
1775 | else if (elementType->isUnsignedIntegerType()) | ||||
1776 | typeCode = "u"; | ||||
1777 | else | ||||
1778 | llvm_unreachable("Invalid element type!")::llvm::llvm_unreachable_internal("Invalid element type!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 1778); | ||||
1779 | |||||
1780 | SemaRef.Diag(IList->getBeginLoc(), | ||||
1781 | SemaRef.Context.getTypeSize(VT) > 64 | ||||
1782 | ? diag::note_neon_vector_initializer_non_portable_q | ||||
1783 | : diag::note_neon_vector_initializer_non_portable) | ||||
1784 | << typeCode << typeSize; | ||||
1785 | } | ||||
1786 | |||||
1787 | return; | ||||
1788 | } | ||||
1789 | |||||
1790 | InitializedEntity ElementEntity = | ||||
1791 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||
1792 | |||||
1793 | // OpenCL initializers allows vectors to be constructed from vectors. | ||||
1794 | for (unsigned i = 0; i < maxElements; ++i) { | ||||
1795 | // Don't attempt to go past the end of the init list | ||||
1796 | if (Index >= IList->getNumInits()) | ||||
1797 | break; | ||||
1798 | |||||
1799 | ElementEntity.setElementIndex(Index); | ||||
1800 | |||||
1801 | QualType IType = IList->getInit(Index)->getType(); | ||||
1802 | if (!IType->isVectorType()) { | ||||
1803 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||
1804 | StructuredList, StructuredIndex); | ||||
1805 | ++numEltsInit; | ||||
1806 | } else { | ||||
1807 | QualType VecType; | ||||
1808 | const VectorType *IVT = IType->castAs<VectorType>(); | ||||
1809 | unsigned numIElts = IVT->getNumElements(); | ||||
1810 | |||||
1811 | if (IType->isExtVectorType()) | ||||
1812 | VecType = SemaRef.Context.getExtVectorType(elementType, numIElts); | ||||
1813 | else | ||||
1814 | VecType = SemaRef.Context.getVectorType(elementType, numIElts, | ||||
1815 | IVT->getVectorKind()); | ||||
1816 | CheckSubElementType(ElementEntity, IList, VecType, Index, | ||||
1817 | StructuredList, StructuredIndex); | ||||
1818 | numEltsInit += numIElts; | ||||
1819 | } | ||||
1820 | } | ||||
1821 | |||||
1822 | // OpenCL requires all elements to be initialized. | ||||
1823 | if (numEltsInit != maxElements) { | ||||
1824 | if (!VerifyOnly) | ||||
1825 | SemaRef.Diag(IList->getBeginLoc(), | ||||
1826 | diag::err_vector_incorrect_num_initializers) | ||||
1827 | << (numEltsInit < maxElements) << maxElements << numEltsInit; | ||||
1828 | hadError = true; | ||||
1829 | } | ||||
1830 | } | ||||
1831 | |||||
1832 | /// Check if the type of a class element has an accessible destructor, and marks | ||||
1833 | /// it referenced. Returns true if we shouldn't form a reference to the | ||||
1834 | /// destructor. | ||||
1835 | /// | ||||
1836 | /// Aggregate initialization requires a class element's destructor be | ||||
1837 | /// accessible per 11.6.1 [dcl.init.aggr]: | ||||
1838 | /// | ||||
1839 | /// The destructor for each element of class type is potentially invoked | ||||
1840 | /// (15.4 [class.dtor]) from the context where the aggregate initialization | ||||
1841 | /// occurs. | ||||
1842 | static bool checkDestructorReference(QualType ElementType, SourceLocation Loc, | ||||
1843 | Sema &SemaRef) { | ||||
1844 | auto *CXXRD = ElementType->getAsCXXRecordDecl(); | ||||
1845 | if (!CXXRD) | ||||
1846 | return false; | ||||
1847 | |||||
1848 | CXXDestructorDecl *Destructor = SemaRef.LookupDestructor(CXXRD); | ||||
1849 | SemaRef.CheckDestructorAccess(Loc, Destructor, | ||||
1850 | SemaRef.PDiag(diag::err_access_dtor_temp) | ||||
1851 | << ElementType); | ||||
1852 | SemaRef.MarkFunctionReferenced(Loc, Destructor); | ||||
1853 | return SemaRef.DiagnoseUseOfDecl(Destructor, Loc); | ||||
1854 | } | ||||
1855 | |||||
1856 | void InitListChecker::CheckArrayType(const InitializedEntity &Entity, | ||||
1857 | InitListExpr *IList, QualType &DeclType, | ||||
1858 | llvm::APSInt elementIndex, | ||||
1859 | bool SubobjectIsDesignatorContext, | ||||
1860 | unsigned &Index, | ||||
1861 | InitListExpr *StructuredList, | ||||
1862 | unsigned &StructuredIndex) { | ||||
1863 | const ArrayType *arrayType = SemaRef.Context.getAsArrayType(DeclType); | ||||
1864 | |||||
1865 | if (!VerifyOnly) { | ||||
1866 | if (checkDestructorReference(arrayType->getElementType(), | ||||
1867 | IList->getEndLoc(), SemaRef)) { | ||||
1868 | hadError = true; | ||||
1869 | return; | ||||
1870 | } | ||||
1871 | } | ||||
1872 | |||||
1873 | // Check for the special-case of initializing an array with a string. | ||||
1874 | if (Index < IList->getNumInits()) { | ||||
1875 | if (IsStringInit(IList->getInit(Index), arrayType, SemaRef.Context) == | ||||
1876 | SIF_None) { | ||||
1877 | // We place the string literal directly into the resulting | ||||
1878 | // initializer list. This is the only place where the structure | ||||
1879 | // of the structured initializer list doesn't match exactly, | ||||
1880 | // because doing so would involve allocating one character | ||||
1881 | // constant for each string. | ||||
1882 | // FIXME: Should we do these checks in verify-only mode too? | ||||
1883 | if (!VerifyOnly) | ||||
1884 | CheckStringInit(IList->getInit(Index), DeclType, arrayType, SemaRef); | ||||
1885 | if (StructuredList) { | ||||
1886 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||
1887 | IList->getInit(Index)); | ||||
1888 | StructuredList->resizeInits(SemaRef.Context, StructuredIndex); | ||||
1889 | } | ||||
1890 | ++Index; | ||||
1891 | return; | ||||
1892 | } | ||||
1893 | } | ||||
1894 | if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(arrayType)) { | ||||
1895 | // Check for VLAs; in standard C it would be possible to check this | ||||
1896 | // earlier, but I don't know where clang accepts VLAs (gcc accepts | ||||
1897 | // them in all sorts of strange places). | ||||
1898 | if (!VerifyOnly) | ||||
1899 | SemaRef.Diag(VAT->getSizeExpr()->getBeginLoc(), | ||||
1900 | diag::err_variable_object_no_init) | ||||
1901 | << VAT->getSizeExpr()->getSourceRange(); | ||||
1902 | hadError = true; | ||||
1903 | ++Index; | ||||
1904 | ++StructuredIndex; | ||||
1905 | return; | ||||
1906 | } | ||||
1907 | |||||
1908 | // We might know the maximum number of elements in advance. | ||||
1909 | llvm::APSInt maxElements(elementIndex.getBitWidth(), | ||||
1910 | elementIndex.isUnsigned()); | ||||
1911 | bool maxElementsKnown = false; | ||||
1912 | if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(arrayType)) { | ||||
1913 | maxElements = CAT->getSize(); | ||||
1914 | elementIndex = elementIndex.extOrTrunc(maxElements.getBitWidth()); | ||||
1915 | elementIndex.setIsUnsigned(maxElements.isUnsigned()); | ||||
1916 | maxElementsKnown = true; | ||||
1917 | } | ||||
1918 | |||||
1919 | QualType elementType = arrayType->getElementType(); | ||||
1920 | while (Index < IList->getNumInits()) { | ||||
1921 | Expr *Init = IList->getInit(Index); | ||||
1922 | if (DesignatedInitExpr *DIE = dyn_cast<DesignatedInitExpr>(Init)) { | ||||
1923 | // If we're not the subobject that matches up with the '{' for | ||||
1924 | // the designator, we shouldn't be handling the | ||||
1925 | // designator. Return immediately. | ||||
1926 | if (!SubobjectIsDesignatorContext) | ||||
1927 | return; | ||||
1928 | |||||
1929 | // Handle this designated initializer. elementIndex will be | ||||
1930 | // updated to be the next array element we'll initialize. | ||||
1931 | if (CheckDesignatedInitializer(Entity, IList, DIE, 0, | ||||
1932 | DeclType, nullptr, &elementIndex, Index, | ||||
1933 | StructuredList, StructuredIndex, true, | ||||
1934 | false)) { | ||||
1935 | hadError = true; | ||||
1936 | continue; | ||||
1937 | } | ||||
1938 | |||||
1939 | if (elementIndex.getBitWidth() > maxElements.getBitWidth()) | ||||
1940 | maxElements = maxElements.extend(elementIndex.getBitWidth()); | ||||
1941 | else if (elementIndex.getBitWidth() < maxElements.getBitWidth()) | ||||
1942 | elementIndex = elementIndex.extend(maxElements.getBitWidth()); | ||||
1943 | elementIndex.setIsUnsigned(maxElements.isUnsigned()); | ||||
1944 | |||||
1945 | // If the array is of incomplete type, keep track of the number of | ||||
1946 | // elements in the initializer. | ||||
1947 | if (!maxElementsKnown && elementIndex > maxElements) | ||||
1948 | maxElements = elementIndex; | ||||
1949 | |||||
1950 | continue; | ||||
1951 | } | ||||
1952 | |||||
1953 | // If we know the maximum number of elements, and we've already | ||||
1954 | // hit it, stop consuming elements in the initializer list. | ||||
1955 | if (maxElementsKnown && elementIndex == maxElements) | ||||
1956 | break; | ||||
1957 | |||||
1958 | InitializedEntity ElementEntity = | ||||
1959 | InitializedEntity::InitializeElement(SemaRef.Context, StructuredIndex, | ||||
1960 | Entity); | ||||
1961 | // Check this element. | ||||
1962 | CheckSubElementType(ElementEntity, IList, elementType, Index, | ||||
1963 | StructuredList, StructuredIndex); | ||||
1964 | ++elementIndex; | ||||
1965 | |||||
1966 | // If the array is of incomplete type, keep track of the number of | ||||
1967 | // elements in the initializer. | ||||
1968 | if (!maxElementsKnown && elementIndex > maxElements) | ||||
1969 | maxElements = elementIndex; | ||||
1970 | } | ||||
1971 | if (!hadError && DeclType->isIncompleteArrayType() && !VerifyOnly) { | ||||
1972 | // If this is an incomplete array type, the actual type needs to | ||||
1973 | // be calculated here. | ||||
1974 | llvm::APSInt Zero(maxElements.getBitWidth(), maxElements.isUnsigned()); | ||||
1975 | if (maxElements == Zero && !Entity.isVariableLengthArrayNew()) { | ||||
1976 | // Sizing an array implicitly to zero is not allowed by ISO C, | ||||
1977 | // but is supported by GNU. | ||||
1978 | SemaRef.Diag(IList->getBeginLoc(), diag::ext_typecheck_zero_array_size); | ||||
1979 | } | ||||
1980 | |||||
1981 | DeclType = SemaRef.Context.getConstantArrayType( | ||||
1982 | elementType, maxElements, nullptr, ArrayType::Normal, 0); | ||||
1983 | } | ||||
1984 | if (!hadError) { | ||||
1985 | // If there are any members of the array that get value-initialized, check | ||||
1986 | // that is possible. That happens if we know the bound and don't have | ||||
1987 | // enough elements, or if we're performing an array new with an unknown | ||||
1988 | // bound. | ||||
1989 | if ((maxElementsKnown && elementIndex < maxElements) || | ||||
1990 | Entity.isVariableLengthArrayNew()) | ||||
1991 | CheckEmptyInitializable( | ||||
1992 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity), | ||||
1993 | IList->getEndLoc()); | ||||
1994 | } | ||||
1995 | } | ||||
1996 | |||||
1997 | bool InitListChecker::CheckFlexibleArrayInit(const InitializedEntity &Entity, | ||||
1998 | Expr *InitExpr, | ||||
1999 | FieldDecl *Field, | ||||
2000 | bool TopLevelObject) { | ||||
2001 | // Handle GNU flexible array initializers. | ||||
2002 | unsigned FlexArrayDiag; | ||||
2003 | if (isa<InitListExpr>(InitExpr) && | ||||
2004 | cast<InitListExpr>(InitExpr)->getNumInits() == 0) { | ||||
2005 | // Empty flexible array init always allowed as an extension | ||||
2006 | FlexArrayDiag = diag::ext_flexible_array_init; | ||||
2007 | } else if (SemaRef.getLangOpts().CPlusPlus) { | ||||
2008 | // Disallow flexible array init in C++; it is not required for gcc | ||||
2009 | // compatibility, and it needs work to IRGen correctly in general. | ||||
2010 | FlexArrayDiag = diag::err_flexible_array_init; | ||||
2011 | } else if (!TopLevelObject) { | ||||
2012 | // Disallow flexible array init on non-top-level object | ||||
2013 | FlexArrayDiag = diag::err_flexible_array_init; | ||||
2014 | } else if (Entity.getKind() != InitializedEntity::EK_Variable) { | ||||
2015 | // Disallow flexible array init on anything which is not a variable. | ||||
2016 | FlexArrayDiag = diag::err_flexible_array_init; | ||||
2017 | } else if (cast<VarDecl>(Entity.getDecl())->hasLocalStorage()) { | ||||
2018 | // Disallow flexible array init on local variables. | ||||
2019 | FlexArrayDiag = diag::err_flexible_array_init; | ||||
2020 | } else { | ||||
2021 | // Allow other cases. | ||||
2022 | FlexArrayDiag = diag::ext_flexible_array_init; | ||||
2023 | } | ||||
2024 | |||||
2025 | if (!VerifyOnly) { | ||||
2026 | SemaRef.Diag(InitExpr->getBeginLoc(), FlexArrayDiag) | ||||
2027 | << InitExpr->getBeginLoc(); | ||||
2028 | SemaRef.Diag(Field->getLocation(), diag::note_flexible_array_member) | ||||
2029 | << Field; | ||||
2030 | } | ||||
2031 | |||||
2032 | return FlexArrayDiag != diag::ext_flexible_array_init; | ||||
2033 | } | ||||
2034 | |||||
2035 | void InitListChecker::CheckStructUnionTypes( | ||||
2036 | const InitializedEntity &Entity, InitListExpr *IList, QualType DeclType, | ||||
2037 | CXXRecordDecl::base_class_range Bases, RecordDecl::field_iterator Field, | ||||
2038 | bool SubobjectIsDesignatorContext, unsigned &Index, | ||||
2039 | InitListExpr *StructuredList, unsigned &StructuredIndex, | ||||
2040 | bool TopLevelObject) { | ||||
2041 | RecordDecl *structDecl = DeclType->castAs<RecordType>()->getDecl(); | ||||
2042 | |||||
2043 | // If the record is invalid, some of it's members are invalid. To avoid | ||||
2044 | // confusion, we forgo checking the intializer for the entire record. | ||||
2045 | if (structDecl->isInvalidDecl()) { | ||||
2046 | // Assume it was supposed to consume a single initializer. | ||||
2047 | ++Index; | ||||
2048 | hadError = true; | ||||
2049 | return; | ||||
2050 | } | ||||
2051 | |||||
2052 | if (DeclType->isUnionType() && IList->getNumInits() == 0) { | ||||
2053 | RecordDecl *RD = DeclType->castAs<RecordType>()->getDecl(); | ||||
2054 | |||||
2055 | if (!VerifyOnly) | ||||
2056 | for (FieldDecl *FD : RD->fields()) { | ||||
2057 | QualType ET = SemaRef.Context.getBaseElementType(FD->getType()); | ||||
2058 | if (checkDestructorReference(ET, IList->getEndLoc(), SemaRef)) { | ||||
2059 | hadError = true; | ||||
2060 | return; | ||||
2061 | } | ||||
2062 | } | ||||
2063 | |||||
2064 | // If there's a default initializer, use it. | ||||
2065 | if (isa<CXXRecordDecl>(RD) && | ||||
2066 | cast<CXXRecordDecl>(RD)->hasInClassInitializer()) { | ||||
2067 | if (!StructuredList) | ||||
2068 | return; | ||||
2069 | for (RecordDecl::field_iterator FieldEnd = RD->field_end(); | ||||
2070 | Field != FieldEnd; ++Field) { | ||||
2071 | if (Field->hasInClassInitializer()) { | ||||
2072 | StructuredList->setInitializedFieldInUnion(*Field); | ||||
2073 | // FIXME: Actually build a CXXDefaultInitExpr? | ||||
2074 | return; | ||||
2075 | } | ||||
2076 | } | ||||
2077 | } | ||||
2078 | |||||
2079 | // Value-initialize the first member of the union that isn't an unnamed | ||||
2080 | // bitfield. | ||||
2081 | for (RecordDecl::field_iterator FieldEnd = RD->field_end(); | ||||
2082 | Field != FieldEnd; ++Field) { | ||||
2083 | if (!Field->isUnnamedBitfield()) { | ||||
2084 | CheckEmptyInitializable( | ||||
2085 | InitializedEntity::InitializeMember(*Field, &Entity), | ||||
2086 | IList->getEndLoc()); | ||||
2087 | if (StructuredList) | ||||
2088 | StructuredList->setInitializedFieldInUnion(*Field); | ||||
2089 | break; | ||||
2090 | } | ||||
2091 | } | ||||
2092 | return; | ||||
2093 | } | ||||
2094 | |||||
2095 | bool InitializedSomething = false; | ||||
2096 | |||||
2097 | // If we have any base classes, they are initialized prior to the fields. | ||||
2098 | for (auto &Base : Bases) { | ||||
2099 | Expr *Init = Index < IList->getNumInits() ? IList->getInit(Index) : nullptr; | ||||
2100 | |||||
2101 | // Designated inits always initialize fields, so if we see one, all | ||||
2102 | // remaining base classes have no explicit initializer. | ||||
2103 | if (Init && isa<DesignatedInitExpr>(Init)) | ||||
2104 | Init = nullptr; | ||||
2105 | |||||
2106 | SourceLocation InitLoc = Init ? Init->getBeginLoc() : IList->getEndLoc(); | ||||
2107 | InitializedEntity BaseEntity = InitializedEntity::InitializeBase( | ||||
2108 | SemaRef.Context, &Base, false, &Entity); | ||||
2109 | if (Init) { | ||||
2110 | CheckSubElementType(BaseEntity, IList, Base.getType(), Index, | ||||
2111 | StructuredList, StructuredIndex); | ||||
2112 | InitializedSomething = true; | ||||
2113 | } else { | ||||
2114 | CheckEmptyInitializable(BaseEntity, InitLoc); | ||||
2115 | } | ||||
2116 | |||||
2117 | if (!VerifyOnly) | ||||
2118 | if (checkDestructorReference(Base.getType(), InitLoc, SemaRef)) { | ||||
2119 | hadError = true; | ||||
2120 | return; | ||||
2121 | } | ||||
2122 | } | ||||
2123 | |||||
2124 | // If structDecl is a forward declaration, this loop won't do | ||||
2125 | // anything except look at designated initializers; That's okay, | ||||
2126 | // because an error should get printed out elsewhere. It might be | ||||
2127 | // worthwhile to skip over the rest of the initializer, though. | ||||
2128 | RecordDecl *RD = DeclType->castAs<RecordType>()->getDecl(); | ||||
2129 | RecordDecl::field_iterator FieldEnd = RD->field_end(); | ||||
2130 | bool CheckForMissingFields = | ||||
2131 | !IList->isIdiomaticZeroInitializer(SemaRef.getLangOpts()); | ||||
2132 | bool HasDesignatedInit = false; | ||||
2133 | |||||
2134 | while (Index < IList->getNumInits()) { | ||||
2135 | Expr *Init = IList->getInit(Index); | ||||
2136 | SourceLocation InitLoc = Init->getBeginLoc(); | ||||
2137 | |||||
2138 | if (DesignatedInitExpr *DIE = dyn_cast<DesignatedInitExpr>(Init)) { | ||||
2139 | // If we're not the subobject that matches up with the '{' for | ||||
2140 | // the designator, we shouldn't be handling the | ||||
2141 | // designator. Return immediately. | ||||
2142 | if (!SubobjectIsDesignatorContext) | ||||
2143 | return; | ||||
2144 | |||||
2145 | HasDesignatedInit = true; | ||||
2146 | |||||
2147 | // Handle this designated initializer. Field will be updated to | ||||
2148 | // the next field that we'll be initializing. | ||||
2149 | if (CheckDesignatedInitializer(Entity, IList, DIE, 0, | ||||
2150 | DeclType, &Field, nullptr, Index, | ||||
2151 | StructuredList, StructuredIndex, | ||||
2152 | true, TopLevelObject)) | ||||
2153 | hadError = true; | ||||
2154 | else if (!VerifyOnly) { | ||||
2155 | // Find the field named by the designated initializer. | ||||
2156 | RecordDecl::field_iterator F = RD->field_begin(); | ||||
2157 | while (std::next(F) != Field) | ||||
2158 | ++F; | ||||
2159 | QualType ET = SemaRef.Context.getBaseElementType(F->getType()); | ||||
2160 | if (checkDestructorReference(ET, InitLoc, SemaRef)) { | ||||
2161 | hadError = true; | ||||
2162 | return; | ||||
2163 | } | ||||
2164 | } | ||||
2165 | |||||
2166 | InitializedSomething = true; | ||||
2167 | |||||
2168 | // Disable check for missing fields when designators are used. | ||||
2169 | // This matches gcc behaviour. | ||||
2170 | CheckForMissingFields = false; | ||||
2171 | continue; | ||||
2172 | } | ||||
2173 | |||||
2174 | if (Field == FieldEnd) { | ||||
2175 | // We've run out of fields. We're done. | ||||
2176 | break; | ||||
2177 | } | ||||
2178 | |||||
2179 | // We've already initialized a member of a union. We're done. | ||||
2180 | if (InitializedSomething && DeclType->isUnionType()) | ||||
2181 | break; | ||||
2182 | |||||
2183 | // If we've hit the flexible array member at the end, we're done. | ||||
2184 | if (Field->getType()->isIncompleteArrayType()) | ||||
2185 | break; | ||||
2186 | |||||
2187 | if (Field->isUnnamedBitfield()) { | ||||
2188 | // Don't initialize unnamed bitfields, e.g. "int : 20;" | ||||
2189 | ++Field; | ||||
2190 | continue; | ||||
2191 | } | ||||
2192 | |||||
2193 | // Make sure we can use this declaration. | ||||
2194 | bool InvalidUse; | ||||
2195 | if (VerifyOnly) | ||||
2196 | InvalidUse = !SemaRef.CanUseDecl(*Field, TreatUnavailableAsInvalid); | ||||
2197 | else | ||||
2198 | InvalidUse = SemaRef.DiagnoseUseOfDecl( | ||||
2199 | *Field, IList->getInit(Index)->getBeginLoc()); | ||||
2200 | if (InvalidUse) { | ||||
2201 | ++Index; | ||||
2202 | ++Field; | ||||
2203 | hadError = true; | ||||
2204 | continue; | ||||
2205 | } | ||||
2206 | |||||
2207 | if (!VerifyOnly) { | ||||
2208 | QualType ET = SemaRef.Context.getBaseElementType(Field->getType()); | ||||
2209 | if (checkDestructorReference(ET, InitLoc, SemaRef)) { | ||||
2210 | hadError = true; | ||||
2211 | return; | ||||
2212 | } | ||||
2213 | } | ||||
2214 | |||||
2215 | InitializedEntity MemberEntity = | ||||
2216 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||
2217 | CheckSubElementType(MemberEntity, IList, Field->getType(), Index, | ||||
2218 | StructuredList, StructuredIndex); | ||||
2219 | InitializedSomething = true; | ||||
2220 | |||||
2221 | if (DeclType->isUnionType() && StructuredList) { | ||||
2222 | // Initialize the first field within the union. | ||||
2223 | StructuredList->setInitializedFieldInUnion(*Field); | ||||
2224 | } | ||||
2225 | |||||
2226 | ++Field; | ||||
2227 | } | ||||
2228 | |||||
2229 | // Emit warnings for missing struct field initializers. | ||||
2230 | if (!VerifyOnly && InitializedSomething && CheckForMissingFields && | ||||
2231 | Field != FieldEnd && !Field->getType()->isIncompleteArrayType() && | ||||
2232 | !DeclType->isUnionType()) { | ||||
2233 | // It is possible we have one or more unnamed bitfields remaining. | ||||
2234 | // Find first (if any) named field and emit warning. | ||||
2235 | for (RecordDecl::field_iterator it = Field, end = RD->field_end(); | ||||
2236 | it != end; ++it) { | ||||
2237 | if (!it->isUnnamedBitfield() && !it->hasInClassInitializer()) { | ||||
2238 | SemaRef.Diag(IList->getSourceRange().getEnd(), | ||||
2239 | diag::warn_missing_field_initializers) << *it; | ||||
2240 | break; | ||||
2241 | } | ||||
2242 | } | ||||
2243 | } | ||||
2244 | |||||
2245 | // Check that any remaining fields can be value-initialized if we're not | ||||
2246 | // building a structured list. (If we are, we'll check this later.) | ||||
2247 | if (!StructuredList && Field != FieldEnd && !DeclType->isUnionType() && | ||||
2248 | !Field->getType()->isIncompleteArrayType()) { | ||||
2249 | for (; Field != FieldEnd && !hadError; ++Field) { | ||||
2250 | if (!Field->isUnnamedBitfield() && !Field->hasInClassInitializer()) | ||||
2251 | CheckEmptyInitializable( | ||||
2252 | InitializedEntity::InitializeMember(*Field, &Entity), | ||||
2253 | IList->getEndLoc()); | ||||
2254 | } | ||||
2255 | } | ||||
2256 | |||||
2257 | // Check that the types of the remaining fields have accessible destructors. | ||||
2258 | if (!VerifyOnly) { | ||||
2259 | // If the initializer expression has a designated initializer, check the | ||||
2260 | // elements for which a designated initializer is not provided too. | ||||
2261 | RecordDecl::field_iterator I = HasDesignatedInit ? RD->field_begin() | ||||
2262 | : Field; | ||||
2263 | for (RecordDecl::field_iterator E = RD->field_end(); I != E; ++I) { | ||||
2264 | QualType ET = SemaRef.Context.getBaseElementType(I->getType()); | ||||
2265 | if (checkDestructorReference(ET, IList->getEndLoc(), SemaRef)) { | ||||
2266 | hadError = true; | ||||
2267 | return; | ||||
2268 | } | ||||
2269 | } | ||||
2270 | } | ||||
2271 | |||||
2272 | if (Field == FieldEnd || !Field->getType()->isIncompleteArrayType() || | ||||
2273 | Index >= IList->getNumInits()) | ||||
2274 | return; | ||||
2275 | |||||
2276 | if (CheckFlexibleArrayInit(Entity, IList->getInit(Index), *Field, | ||||
2277 | TopLevelObject)) { | ||||
2278 | hadError = true; | ||||
2279 | ++Index; | ||||
2280 | return; | ||||
2281 | } | ||||
2282 | |||||
2283 | InitializedEntity MemberEntity = | ||||
2284 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||
2285 | |||||
2286 | if (isa<InitListExpr>(IList->getInit(Index))) | ||||
2287 | CheckSubElementType(MemberEntity, IList, Field->getType(), Index, | ||||
2288 | StructuredList, StructuredIndex); | ||||
2289 | else | ||||
2290 | CheckImplicitInitList(MemberEntity, IList, Field->getType(), Index, | ||||
2291 | StructuredList, StructuredIndex); | ||||
2292 | } | ||||
2293 | |||||
2294 | /// Expand a field designator that refers to a member of an | ||||
2295 | /// anonymous struct or union into a series of field designators that | ||||
2296 | /// refers to the field within the appropriate subobject. | ||||
2297 | /// | ||||
2298 | static void ExpandAnonymousFieldDesignator(Sema &SemaRef, | ||||
2299 | DesignatedInitExpr *DIE, | ||||
2300 | unsigned DesigIdx, | ||||
2301 | IndirectFieldDecl *IndirectField) { | ||||
2302 | typedef DesignatedInitExpr::Designator Designator; | ||||
2303 | |||||
2304 | // Build the replacement designators. | ||||
2305 | SmallVector<Designator, 4> Replacements; | ||||
2306 | for (IndirectFieldDecl::chain_iterator PI = IndirectField->chain_begin(), | ||||
2307 | PE = IndirectField->chain_end(); PI != PE; ++PI) { | ||||
2308 | if (PI + 1 == PE) | ||||
2309 | Replacements.push_back(Designator((IdentifierInfo *)nullptr, | ||||
2310 | DIE->getDesignator(DesigIdx)->getDotLoc(), | ||||
2311 | DIE->getDesignator(DesigIdx)->getFieldLoc())); | ||||
2312 | else | ||||
2313 | Replacements.push_back(Designator((IdentifierInfo *)nullptr, | ||||
2314 | SourceLocation(), SourceLocation())); | ||||
2315 | assert(isa<FieldDecl>(*PI))(static_cast <bool> (isa<FieldDecl>(*PI)) ? void ( 0) : __assert_fail ("isa<FieldDecl>(*PI)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2315, __extension__ __PRETTY_FUNCTION__)); | ||||
2316 | Replacements.back().setField(cast<FieldDecl>(*PI)); | ||||
2317 | } | ||||
2318 | |||||
2319 | // Expand the current designator into the set of replacement | ||||
2320 | // designators, so we have a full subobject path down to where the | ||||
2321 | // member of the anonymous struct/union is actually stored. | ||||
2322 | DIE->ExpandDesignator(SemaRef.Context, DesigIdx, &Replacements[0], | ||||
2323 | &Replacements[0] + Replacements.size()); | ||||
2324 | } | ||||
2325 | |||||
2326 | static DesignatedInitExpr *CloneDesignatedInitExpr(Sema &SemaRef, | ||||
2327 | DesignatedInitExpr *DIE) { | ||||
2328 | unsigned NumIndexExprs = DIE->getNumSubExprs() - 1; | ||||
2329 | SmallVector<Expr*, 4> IndexExprs(NumIndexExprs); | ||||
2330 | for (unsigned I = 0; I < NumIndexExprs; ++I) | ||||
2331 | IndexExprs[I] = DIE->getSubExpr(I + 1); | ||||
2332 | return DesignatedInitExpr::Create(SemaRef.Context, DIE->designators(), | ||||
2333 | IndexExprs, | ||||
2334 | DIE->getEqualOrColonLoc(), | ||||
2335 | DIE->usesGNUSyntax(), DIE->getInit()); | ||||
2336 | } | ||||
2337 | |||||
2338 | namespace { | ||||
2339 | |||||
2340 | // Callback to only accept typo corrections that are for field members of | ||||
2341 | // the given struct or union. | ||||
2342 | class FieldInitializerValidatorCCC final : public CorrectionCandidateCallback { | ||||
2343 | public: | ||||
2344 | explicit FieldInitializerValidatorCCC(RecordDecl *RD) | ||||
2345 | : Record(RD) {} | ||||
2346 | |||||
2347 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||
2348 | FieldDecl *FD = candidate.getCorrectionDeclAs<FieldDecl>(); | ||||
2349 | return FD && FD->getDeclContext()->getRedeclContext()->Equals(Record); | ||||
2350 | } | ||||
2351 | |||||
2352 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||
2353 | return std::make_unique<FieldInitializerValidatorCCC>(*this); | ||||
2354 | } | ||||
2355 | |||||
2356 | private: | ||||
2357 | RecordDecl *Record; | ||||
2358 | }; | ||||
2359 | |||||
2360 | } // end anonymous namespace | ||||
2361 | |||||
2362 | /// Check the well-formedness of a C99 designated initializer. | ||||
2363 | /// | ||||
2364 | /// Determines whether the designated initializer @p DIE, which | ||||
2365 | /// resides at the given @p Index within the initializer list @p | ||||
2366 | /// IList, is well-formed for a current object of type @p DeclType | ||||
2367 | /// (C99 6.7.8). The actual subobject that this designator refers to | ||||
2368 | /// within the current subobject is returned in either | ||||
2369 | /// @p NextField or @p NextElementIndex (whichever is appropriate). | ||||
2370 | /// | ||||
2371 | /// @param IList The initializer list in which this designated | ||||
2372 | /// initializer occurs. | ||||
2373 | /// | ||||
2374 | /// @param DIE The designated initializer expression. | ||||
2375 | /// | ||||
2376 | /// @param DesigIdx The index of the current designator. | ||||
2377 | /// | ||||
2378 | /// @param CurrentObjectType The type of the "current object" (C99 6.7.8p17), | ||||
2379 | /// into which the designation in @p DIE should refer. | ||||
2380 | /// | ||||
2381 | /// @param NextField If non-NULL and the first designator in @p DIE is | ||||
2382 | /// a field, this will be set to the field declaration corresponding | ||||
2383 | /// to the field named by the designator. On input, this is expected to be | ||||
2384 | /// the next field that would be initialized in the absence of designation, | ||||
2385 | /// if the complete object being initialized is a struct. | ||||
2386 | /// | ||||
2387 | /// @param NextElementIndex If non-NULL and the first designator in @p | ||||
2388 | /// DIE is an array designator or GNU array-range designator, this | ||||
2389 | /// will be set to the last index initialized by this designator. | ||||
2390 | /// | ||||
2391 | /// @param Index Index into @p IList where the designated initializer | ||||
2392 | /// @p DIE occurs. | ||||
2393 | /// | ||||
2394 | /// @param StructuredList The initializer list expression that | ||||
2395 | /// describes all of the subobject initializers in the order they'll | ||||
2396 | /// actually be initialized. | ||||
2397 | /// | ||||
2398 | /// @returns true if there was an error, false otherwise. | ||||
2399 | bool | ||||
2400 | InitListChecker::CheckDesignatedInitializer(const InitializedEntity &Entity, | ||||
2401 | InitListExpr *IList, | ||||
2402 | DesignatedInitExpr *DIE, | ||||
2403 | unsigned DesigIdx, | ||||
2404 | QualType &CurrentObjectType, | ||||
2405 | RecordDecl::field_iterator *NextField, | ||||
2406 | llvm::APSInt *NextElementIndex, | ||||
2407 | unsigned &Index, | ||||
2408 | InitListExpr *StructuredList, | ||||
2409 | unsigned &StructuredIndex, | ||||
2410 | bool FinishSubobjectInit, | ||||
2411 | bool TopLevelObject) { | ||||
2412 | if (DesigIdx == DIE->size()) { | ||||
| |||||
2413 | // C++20 designated initialization can result in direct-list-initialization | ||||
2414 | // of the designated subobject. This is the only way that we can end up | ||||
2415 | // performing direct initialization as part of aggregate initialization, so | ||||
2416 | // it needs special handling. | ||||
2417 | if (DIE->isDirectInit()) { | ||||
2418 | Expr *Init = DIE->getInit(); | ||||
2419 | assert(isa<InitListExpr>(Init) &&(static_cast <bool> (isa<InitListExpr>(Init) && "designator result in direct non-list initialization?") ? void (0) : __assert_fail ("isa<InitListExpr>(Init) && \"designator result in direct non-list initialization?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2420, __extension__ __PRETTY_FUNCTION__)) | ||||
2420 | "designator result in direct non-list initialization?")(static_cast <bool> (isa<InitListExpr>(Init) && "designator result in direct non-list initialization?") ? void (0) : __assert_fail ("isa<InitListExpr>(Init) && \"designator result in direct non-list initialization?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2420, __extension__ __PRETTY_FUNCTION__)); | ||||
2421 | InitializationKind Kind = InitializationKind::CreateDirectList( | ||||
2422 | DIE->getBeginLoc(), Init->getBeginLoc(), Init->getEndLoc()); | ||||
2423 | InitializationSequence Seq(SemaRef, Entity, Kind, Init, | ||||
2424 | /*TopLevelOfInitList*/ true); | ||||
2425 | if (StructuredList) { | ||||
2426 | ExprResult Result = VerifyOnly | ||||
2427 | ? getDummyInit() | ||||
2428 | : Seq.Perform(SemaRef, Entity, Kind, Init); | ||||
2429 | UpdateStructuredListElement(StructuredList, StructuredIndex, | ||||
2430 | Result.get()); | ||||
2431 | } | ||||
2432 | ++Index; | ||||
2433 | return !Seq; | ||||
2434 | } | ||||
2435 | |||||
2436 | // Check the actual initialization for the designated object type. | ||||
2437 | bool prevHadError = hadError; | ||||
2438 | |||||
2439 | // Temporarily remove the designator expression from the | ||||
2440 | // initializer list that the child calls see, so that we don't try | ||||
2441 | // to re-process the designator. | ||||
2442 | unsigned OldIndex = Index; | ||||
2443 | IList->setInit(OldIndex, DIE->getInit()); | ||||
2444 | |||||
2445 | CheckSubElementType(Entity, IList, CurrentObjectType, Index, StructuredList, | ||||
2446 | StructuredIndex, /*DirectlyDesignated=*/true); | ||||
2447 | |||||
2448 | // Restore the designated initializer expression in the syntactic | ||||
2449 | // form of the initializer list. | ||||
2450 | if (IList->getInit(OldIndex) != DIE->getInit()) | ||||
2451 | DIE->setInit(IList->getInit(OldIndex)); | ||||
2452 | IList->setInit(OldIndex, DIE); | ||||
2453 | |||||
2454 | return hadError && !prevHadError; | ||||
2455 | } | ||||
2456 | |||||
2457 | DesignatedInitExpr::Designator *D = DIE->getDesignator(DesigIdx); | ||||
2458 | bool IsFirstDesignator = (DesigIdx == 0); | ||||
2459 | if (IsFirstDesignator
| ||||
2460 | // Determine the structural initializer list that corresponds to the | ||||
2461 | // current subobject. | ||||
2462 | if (IsFirstDesignator) | ||||
2463 | StructuredList = FullyStructuredList; | ||||
2464 | else { | ||||
2465 | Expr *ExistingInit = StructuredIndex < StructuredList->getNumInits() ? | ||||
2466 | StructuredList->getInit(StructuredIndex) : nullptr; | ||||
2467 | if (!ExistingInit && StructuredList->hasArrayFiller()) | ||||
2468 | ExistingInit = StructuredList->getArrayFiller(); | ||||
2469 | |||||
2470 | if (!ExistingInit) | ||||
2471 | StructuredList = getStructuredSubobjectInit( | ||||
2472 | IList, Index, CurrentObjectType, StructuredList, StructuredIndex, | ||||
2473 | SourceRange(D->getBeginLoc(), DIE->getEndLoc())); | ||||
2474 | else if (InitListExpr *Result = dyn_cast<InitListExpr>(ExistingInit)) | ||||
2475 | StructuredList = Result; | ||||
2476 | else { | ||||
2477 | // We are creating an initializer list that initializes the | ||||
2478 | // subobjects of the current object, but there was already an | ||||
2479 | // initialization that completely initialized the current | ||||
2480 | // subobject, e.g., by a compound literal: | ||||
2481 | // | ||||
2482 | // struct X { int a, b; }; | ||||
2483 | // struct X xs[] = { [0] = (struct X) { 1, 2 }, [0].b = 3 }; | ||||
2484 | // | ||||
2485 | // Here, xs[0].a == 1 and xs[0].b == 3, since the second, | ||||
2486 | // designated initializer re-initializes only its current object | ||||
2487 | // subobject [0].b. | ||||
2488 | diagnoseInitOverride(ExistingInit, | ||||
2489 | SourceRange(D->getBeginLoc(), DIE->getEndLoc()), | ||||
2490 | /*FullyOverwritten=*/false); | ||||
2491 | |||||
2492 | if (!VerifyOnly) { | ||||
2493 | if (DesignatedInitUpdateExpr *E = | ||||
2494 | dyn_cast<DesignatedInitUpdateExpr>(ExistingInit)) | ||||
2495 | StructuredList = E->getUpdater(); | ||||
2496 | else { | ||||
2497 | DesignatedInitUpdateExpr *DIUE = new (SemaRef.Context) | ||||
2498 | DesignatedInitUpdateExpr(SemaRef.Context, D->getBeginLoc(), | ||||
2499 | ExistingInit, DIE->getEndLoc()); | ||||
2500 | StructuredList->updateInit(SemaRef.Context, StructuredIndex, DIUE); | ||||
2501 | StructuredList = DIUE->getUpdater(); | ||||
2502 | } | ||||
2503 | } else { | ||||
2504 | // We don't need to track the structured representation of a | ||||
2505 | // designated init update of an already-fully-initialized object in | ||||
2506 | // verify-only mode. The only reason we would need the structure is | ||||
2507 | // to determine where the uninitialized "holes" are, and in this | ||||
2508 | // case, we know there aren't any and we can't introduce any. | ||||
2509 | StructuredList = nullptr; | ||||
2510 | } | ||||
2511 | } | ||||
2512 | } | ||||
2513 | } | ||||
2514 | |||||
2515 | if (D->isFieldDesignator()) { | ||||
2516 | // C99 6.7.8p7: | ||||
2517 | // | ||||
2518 | // If a designator has the form | ||||
2519 | // | ||||
2520 | // . identifier | ||||
2521 | // | ||||
2522 | // then the current object (defined below) shall have | ||||
2523 | // structure or union type and the identifier shall be the | ||||
2524 | // name of a member of that type. | ||||
2525 | const RecordType *RT = CurrentObjectType->getAs<RecordType>(); | ||||
2526 | if (!RT) { | ||||
2527 | SourceLocation Loc = D->getDotLoc(); | ||||
2528 | if (Loc.isInvalid()) | ||||
2529 | Loc = D->getFieldLoc(); | ||||
2530 | if (!VerifyOnly) | ||||
2531 | SemaRef.Diag(Loc, diag::err_field_designator_non_aggr) | ||||
2532 | << SemaRef.getLangOpts().CPlusPlus << CurrentObjectType; | ||||
2533 | ++Index; | ||||
2534 | return true; | ||||
2535 | } | ||||
2536 | |||||
2537 | FieldDecl *KnownField = D->getField(); | ||||
2538 | if (!KnownField) { | ||||
2539 | IdentifierInfo *FieldName = D->getFieldName(); | ||||
2540 | DeclContext::lookup_result Lookup = RT->getDecl()->lookup(FieldName); | ||||
2541 | for (NamedDecl *ND : Lookup) { | ||||
2542 | if (auto *FD = dyn_cast<FieldDecl>(ND)) { | ||||
2543 | KnownField = FD; | ||||
2544 | break; | ||||
2545 | } | ||||
2546 | if (auto *IFD = dyn_cast<IndirectFieldDecl>(ND)) { | ||||
2547 | // In verify mode, don't modify the original. | ||||
2548 | if (VerifyOnly) | ||||
2549 | DIE = CloneDesignatedInitExpr(SemaRef, DIE); | ||||
2550 | ExpandAnonymousFieldDesignator(SemaRef, DIE, DesigIdx, IFD); | ||||
2551 | D = DIE->getDesignator(DesigIdx); | ||||
2552 | KnownField = cast<FieldDecl>(*IFD->chain_begin()); | ||||
2553 | break; | ||||
2554 | } | ||||
2555 | } | ||||
2556 | if (!KnownField) { | ||||
2557 | if (VerifyOnly) { | ||||
2558 | ++Index; | ||||
2559 | return true; // No typo correction when just trying this out. | ||||
2560 | } | ||||
2561 | |||||
2562 | // Name lookup found something, but it wasn't a field. | ||||
2563 | if (!Lookup.empty()) { | ||||
2564 | SemaRef.Diag(D->getFieldLoc(), diag::err_field_designator_nonfield) | ||||
2565 | << FieldName; | ||||
2566 | SemaRef.Diag(Lookup.front()->getLocation(), | ||||
2567 | diag::note_field_designator_found); | ||||
2568 | ++Index; | ||||
2569 | return true; | ||||
2570 | } | ||||
2571 | |||||
2572 | // Name lookup didn't find anything. | ||||
2573 | // Determine whether this was a typo for another field name. | ||||
2574 | FieldInitializerValidatorCCC CCC(RT->getDecl()); | ||||
2575 | if (TypoCorrection Corrected = SemaRef.CorrectTypo( | ||||
2576 | DeclarationNameInfo(FieldName, D->getFieldLoc()), | ||||
2577 | Sema::LookupMemberName, /*Scope=*/nullptr, /*SS=*/nullptr, CCC, | ||||
2578 | Sema::CTK_ErrorRecovery, RT->getDecl())) { | ||||
2579 | SemaRef.diagnoseTypo( | ||||
2580 | Corrected, | ||||
2581 | SemaRef.PDiag(diag::err_field_designator_unknown_suggest) | ||||
2582 | << FieldName << CurrentObjectType); | ||||
2583 | KnownField = Corrected.getCorrectionDeclAs<FieldDecl>(); | ||||
2584 | hadError = true; | ||||
2585 | } else { | ||||
2586 | // Typo correction didn't find anything. | ||||
2587 | SemaRef.Diag(D->getFieldLoc(), diag::err_field_designator_unknown) | ||||
2588 | << FieldName << CurrentObjectType; | ||||
2589 | ++Index; | ||||
2590 | return true; | ||||
2591 | } | ||||
2592 | } | ||||
2593 | } | ||||
2594 | |||||
2595 | unsigned NumBases = 0; | ||||
2596 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RT->getDecl())) | ||||
2597 | NumBases = CXXRD->getNumBases(); | ||||
2598 | |||||
2599 | unsigned FieldIndex = NumBases; | ||||
2600 | |||||
2601 | for (auto *FI : RT->getDecl()->fields()) { | ||||
2602 | if (FI->isUnnamedBitfield()) | ||||
2603 | continue; | ||||
2604 | if (declaresSameEntity(KnownField, FI)) { | ||||
2605 | KnownField = FI; | ||||
2606 | break; | ||||
2607 | } | ||||
2608 | ++FieldIndex; | ||||
2609 | } | ||||
2610 | |||||
2611 | RecordDecl::field_iterator Field = | ||||
2612 | RecordDecl::field_iterator(DeclContext::decl_iterator(KnownField)); | ||||
2613 | |||||
2614 | // All of the fields of a union are located at the same place in | ||||
2615 | // the initializer list. | ||||
2616 | if (RT->getDecl()->isUnion()) { | ||||
2617 | FieldIndex = 0; | ||||
2618 | if (StructuredList) { | ||||
2619 | FieldDecl *CurrentField = StructuredList->getInitializedFieldInUnion(); | ||||
2620 | if (CurrentField && !declaresSameEntity(CurrentField, *Field)) { | ||||
2621 | assert(StructuredList->getNumInits() == 1(static_cast <bool> (StructuredList->getNumInits() == 1 && "A union should never have more than one initializer!" ) ? void (0) : __assert_fail ("StructuredList->getNumInits() == 1 && \"A union should never have more than one initializer!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2622, __extension__ __PRETTY_FUNCTION__)) | ||||
2622 | && "A union should never have more than one initializer!")(static_cast <bool> (StructuredList->getNumInits() == 1 && "A union should never have more than one initializer!" ) ? void (0) : __assert_fail ("StructuredList->getNumInits() == 1 && \"A union should never have more than one initializer!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2622, __extension__ __PRETTY_FUNCTION__)); | ||||
2623 | |||||
2624 | Expr *ExistingInit = StructuredList->getInit(0); | ||||
2625 | if (ExistingInit) { | ||||
2626 | // We're about to throw away an initializer, emit warning. | ||||
2627 | diagnoseInitOverride( | ||||
2628 | ExistingInit, SourceRange(D->getBeginLoc(), DIE->getEndLoc())); | ||||
2629 | } | ||||
2630 | |||||
2631 | // remove existing initializer | ||||
2632 | StructuredList->resizeInits(SemaRef.Context, 0); | ||||
2633 | StructuredList->setInitializedFieldInUnion(nullptr); | ||||
2634 | } | ||||
2635 | |||||
2636 | StructuredList->setInitializedFieldInUnion(*Field); | ||||
2637 | } | ||||
2638 | } | ||||
2639 | |||||
2640 | // Make sure we can use this declaration. | ||||
2641 | bool InvalidUse; | ||||
2642 | if (VerifyOnly) | ||||
2643 | InvalidUse = !SemaRef.CanUseDecl(*Field, TreatUnavailableAsInvalid); | ||||
2644 | else | ||||
2645 | InvalidUse = SemaRef.DiagnoseUseOfDecl(*Field, D->getFieldLoc()); | ||||
2646 | if (InvalidUse) { | ||||
2647 | ++Index; | ||||
2648 | return true; | ||||
2649 | } | ||||
2650 | |||||
2651 | // C++20 [dcl.init.list]p3: | ||||
2652 | // The ordered identifiers in the designators of the designated- | ||||
2653 | // initializer-list shall form a subsequence of the ordered identifiers | ||||
2654 | // in the direct non-static data members of T. | ||||
2655 | // | ||||
2656 | // Note that this is not a condition on forming the aggregate | ||||
2657 | // initialization, only on actually performing initialization, | ||||
2658 | // so it is not checked in VerifyOnly mode. | ||||
2659 | // | ||||
2660 | // FIXME: This is the only reordering diagnostic we produce, and it only | ||||
2661 | // catches cases where we have a top-level field designator that jumps | ||||
2662 | // backwards. This is the only such case that is reachable in an | ||||
2663 | // otherwise-valid C++20 program, so is the only case that's required for | ||||
2664 | // conformance, but for consistency, we should diagnose all the other | ||||
2665 | // cases where a designator takes us backwards too. | ||||
2666 | if (IsFirstDesignator && !VerifyOnly && SemaRef.getLangOpts().CPlusPlus && | ||||
2667 | NextField && | ||||
2668 | (*NextField == RT->getDecl()->field_end() || | ||||
2669 | (*NextField)->getFieldIndex() > Field->getFieldIndex() + 1)) { | ||||
2670 | // Find the field that we just initialized. | ||||
2671 | FieldDecl *PrevField = nullptr; | ||||
2672 | for (auto FI = RT->getDecl()->field_begin(); | ||||
2673 | FI != RT->getDecl()->field_end(); ++FI) { | ||||
2674 | if (FI->isUnnamedBitfield()) | ||||
2675 | continue; | ||||
2676 | if (*NextField != RT->getDecl()->field_end() && | ||||
2677 | declaresSameEntity(*FI, **NextField)) | ||||
2678 | break; | ||||
2679 | PrevField = *FI; | ||||
2680 | } | ||||
2681 | |||||
2682 | if (PrevField && | ||||
2683 | PrevField->getFieldIndex() > KnownField->getFieldIndex()) { | ||||
2684 | SemaRef.Diag(DIE->getBeginLoc(), diag::ext_designated_init_reordered) | ||||
2685 | << KnownField << PrevField << DIE->getSourceRange(); | ||||
2686 | |||||
2687 | unsigned OldIndex = NumBases + PrevField->getFieldIndex(); | ||||
2688 | if (StructuredList && OldIndex <= StructuredList->getNumInits()) { | ||||
2689 | if (Expr *PrevInit = StructuredList->getInit(OldIndex)) { | ||||
2690 | SemaRef.Diag(PrevInit->getBeginLoc(), | ||||
2691 | diag::note_previous_field_init) | ||||
2692 | << PrevField << PrevInit->getSourceRange(); | ||||
2693 | } | ||||
2694 | } | ||||
2695 | } | ||||
2696 | } | ||||
2697 | |||||
2698 | |||||
2699 | // Update the designator with the field declaration. | ||||
2700 | if (!VerifyOnly) | ||||
2701 | D->setField(*Field); | ||||
2702 | |||||
2703 | // Make sure that our non-designated initializer list has space | ||||
2704 | // for a subobject corresponding to this field. | ||||
2705 | if (StructuredList && FieldIndex >= StructuredList->getNumInits()) | ||||
2706 | StructuredList->resizeInits(SemaRef.Context, FieldIndex + 1); | ||||
2707 | |||||
2708 | // This designator names a flexible array member. | ||||
2709 | if (Field->getType()->isIncompleteArrayType()) { | ||||
2710 | bool Invalid = false; | ||||
2711 | if ((DesigIdx + 1) != DIE->size()) { | ||||
2712 | // We can't designate an object within the flexible array | ||||
2713 | // member (because GCC doesn't allow it). | ||||
2714 | if (!VerifyOnly) { | ||||
2715 | DesignatedInitExpr::Designator *NextD | ||||
2716 | = DIE->getDesignator(DesigIdx + 1); | ||||
2717 | SemaRef.Diag(NextD->getBeginLoc(), | ||||
2718 | diag::err_designator_into_flexible_array_member) | ||||
2719 | << SourceRange(NextD->getBeginLoc(), DIE->getEndLoc()); | ||||
2720 | SemaRef.Diag(Field->getLocation(), diag::note_flexible_array_member) | ||||
2721 | << *Field; | ||||
2722 | } | ||||
2723 | Invalid = true; | ||||
2724 | } | ||||
2725 | |||||
2726 | if (!hadError && !isa<InitListExpr>(DIE->getInit()) && | ||||
2727 | !isa<StringLiteral>(DIE->getInit())) { | ||||
2728 | // The initializer is not an initializer list. | ||||
2729 | if (!VerifyOnly) { | ||||
2730 | SemaRef.Diag(DIE->getInit()->getBeginLoc(), | ||||
2731 | diag::err_flexible_array_init_needs_braces) | ||||
2732 | << DIE->getInit()->getSourceRange(); | ||||
2733 | SemaRef.Diag(Field->getLocation(), diag::note_flexible_array_member) | ||||
2734 | << *Field; | ||||
2735 | } | ||||
2736 | Invalid = true; | ||||
2737 | } | ||||
2738 | |||||
2739 | // Check GNU flexible array initializer. | ||||
2740 | if (!Invalid && CheckFlexibleArrayInit(Entity, DIE->getInit(), *Field, | ||||
2741 | TopLevelObject)) | ||||
2742 | Invalid = true; | ||||
2743 | |||||
2744 | if (Invalid) { | ||||
2745 | ++Index; | ||||
2746 | return true; | ||||
2747 | } | ||||
2748 | |||||
2749 | // Initialize the array. | ||||
2750 | bool prevHadError = hadError; | ||||
2751 | unsigned newStructuredIndex = FieldIndex; | ||||
2752 | unsigned OldIndex = Index; | ||||
2753 | IList->setInit(Index, DIE->getInit()); | ||||
2754 | |||||
2755 | InitializedEntity MemberEntity = | ||||
2756 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||
2757 | CheckSubElementType(MemberEntity, IList, Field->getType(), Index, | ||||
2758 | StructuredList, newStructuredIndex); | ||||
2759 | |||||
2760 | IList->setInit(OldIndex, DIE); | ||||
2761 | if (hadError && !prevHadError) { | ||||
2762 | ++Field; | ||||
2763 | ++FieldIndex; | ||||
2764 | if (NextField) | ||||
2765 | *NextField = Field; | ||||
2766 | StructuredIndex = FieldIndex; | ||||
2767 | return true; | ||||
2768 | } | ||||
2769 | } else { | ||||
2770 | // Recurse to check later designated subobjects. | ||||
2771 | QualType FieldType = Field->getType(); | ||||
2772 | unsigned newStructuredIndex = FieldIndex; | ||||
2773 | |||||
2774 | InitializedEntity MemberEntity = | ||||
2775 | InitializedEntity::InitializeMember(*Field, &Entity); | ||||
2776 | if (CheckDesignatedInitializer(MemberEntity, IList, DIE, DesigIdx + 1, | ||||
2777 | FieldType, nullptr, nullptr, Index, | ||||
2778 | StructuredList, newStructuredIndex, | ||||
2779 | FinishSubobjectInit, false)) | ||||
2780 | return true; | ||||
2781 | } | ||||
2782 | |||||
2783 | // Find the position of the next field to be initialized in this | ||||
2784 | // subobject. | ||||
2785 | ++Field; | ||||
2786 | ++FieldIndex; | ||||
2787 | |||||
2788 | // If this the first designator, our caller will continue checking | ||||
2789 | // the rest of this struct/class/union subobject. | ||||
2790 | if (IsFirstDesignator) { | ||||
2791 | if (NextField) | ||||
2792 | *NextField = Field; | ||||
2793 | StructuredIndex = FieldIndex; | ||||
2794 | return false; | ||||
2795 | } | ||||
2796 | |||||
2797 | if (!FinishSubobjectInit) | ||||
2798 | return false; | ||||
2799 | |||||
2800 | // We've already initialized something in the union; we're done. | ||||
2801 | if (RT->getDecl()->isUnion()) | ||||
2802 | return hadError; | ||||
2803 | |||||
2804 | // Check the remaining fields within this class/struct/union subobject. | ||||
2805 | bool prevHadError = hadError; | ||||
2806 | |||||
2807 | auto NoBases = | ||||
2808 | CXXRecordDecl::base_class_range(CXXRecordDecl::base_class_iterator(), | ||||
2809 | CXXRecordDecl::base_class_iterator()); | ||||
2810 | CheckStructUnionTypes(Entity, IList, CurrentObjectType, NoBases, Field, | ||||
2811 | false, Index, StructuredList, FieldIndex); | ||||
2812 | return hadError && !prevHadError; | ||||
2813 | } | ||||
2814 | |||||
2815 | // C99 6.7.8p6: | ||||
2816 | // | ||||
2817 | // If a designator has the form | ||||
2818 | // | ||||
2819 | // [ constant-expression ] | ||||
2820 | // | ||||
2821 | // then the current object (defined below) shall have array | ||||
2822 | // type and the expression shall be an integer constant | ||||
2823 | // expression. If the array is of unknown size, any | ||||
2824 | // nonnegative value is valid. | ||||
2825 | // | ||||
2826 | // Additionally, cope with the GNU extension that permits | ||||
2827 | // designators of the form | ||||
2828 | // | ||||
2829 | // [ constant-expression ... constant-expression ] | ||||
2830 | const ArrayType *AT = SemaRef.Context.getAsArrayType(CurrentObjectType); | ||||
2831 | if (!AT) { | ||||
2832 | if (!VerifyOnly) | ||||
2833 | SemaRef.Diag(D->getLBracketLoc(), diag::err_array_designator_non_array) | ||||
2834 | << CurrentObjectType; | ||||
2835 | ++Index; | ||||
2836 | return true; | ||||
2837 | } | ||||
2838 | |||||
2839 | Expr *IndexExpr = nullptr; | ||||
2840 | llvm::APSInt DesignatedStartIndex, DesignatedEndIndex; | ||||
2841 | if (D->isArrayDesignator()) { | ||||
2842 | IndexExpr = DIE->getArrayIndex(*D); | ||||
2843 | DesignatedStartIndex = IndexExpr->EvaluateKnownConstInt(SemaRef.Context); | ||||
2844 | DesignatedEndIndex = DesignatedStartIndex; | ||||
2845 | } else { | ||||
2846 | assert(D->isArrayRangeDesignator() && "Need array-range designator")(static_cast <bool> (D->isArrayRangeDesignator() && "Need array-range designator") ? void (0) : __assert_fail ("D->isArrayRangeDesignator() && \"Need array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 2846, __extension__ __PRETTY_FUNCTION__)); | ||||
2847 | |||||
2848 | DesignatedStartIndex = | ||||
2849 | DIE->getArrayRangeStart(*D)->EvaluateKnownConstInt(SemaRef.Context); | ||||
2850 | DesignatedEndIndex = | ||||
2851 | DIE->getArrayRangeEnd(*D)->EvaluateKnownConstInt(SemaRef.Context); | ||||
2852 | IndexExpr = DIE->getArrayRangeEnd(*D); | ||||
2853 | |||||
2854 | // Codegen can't handle evaluating array range designators that have side | ||||
2855 | // effects, because we replicate the AST value for each initialized element. | ||||
2856 | // As such, set the sawArrayRangeDesignator() bit if we initialize multiple | ||||
2857 | // elements with something that has a side effect, so codegen can emit an | ||||
2858 | // "error unsupported" error instead of miscompiling the app. | ||||
2859 | if (DesignatedStartIndex.getZExtValue()!=DesignatedEndIndex.getZExtValue()&& | ||||
2860 | DIE->getInit()->HasSideEffects(SemaRef.Context) && !VerifyOnly) | ||||
2861 | FullyStructuredList->sawArrayRangeDesignator(); | ||||
| |||||
2862 | } | ||||
2863 | |||||
2864 | if (isa<ConstantArrayType>(AT)) { | ||||
2865 | llvm::APSInt MaxElements(cast<ConstantArrayType>(AT)->getSize(), false); | ||||
2866 | DesignatedStartIndex | ||||
2867 | = DesignatedStartIndex.extOrTrunc(MaxElements.getBitWidth()); | ||||
2868 | DesignatedStartIndex.setIsUnsigned(MaxElements.isUnsigned()); | ||||
2869 | DesignatedEndIndex | ||||
2870 | = DesignatedEndIndex.extOrTrunc(MaxElements.getBitWidth()); | ||||
2871 | DesignatedEndIndex.setIsUnsigned(MaxElements.isUnsigned()); | ||||
2872 | if (DesignatedEndIndex >= MaxElements) { | ||||
2873 | if (!VerifyOnly) | ||||
2874 | SemaRef.Diag(IndexExpr->getBeginLoc(), | ||||
2875 | diag::err_array_designator_too_large) | ||||
2876 | << toString(DesignatedEndIndex, 10) << toString(MaxElements, 10) | ||||
2877 | << IndexExpr->getSourceRange(); | ||||
2878 | ++Index; | ||||
2879 | return true; | ||||
2880 | } | ||||
2881 | } else { | ||||
2882 | unsigned DesignatedIndexBitWidth = | ||||
2883 | ConstantArrayType::getMaxSizeBits(SemaRef.Context); | ||||
2884 | DesignatedStartIndex = | ||||
2885 | DesignatedStartIndex.extOrTrunc(DesignatedIndexBitWidth); | ||||
2886 | DesignatedEndIndex = | ||||
2887 | DesignatedEndIndex.extOrTrunc(DesignatedIndexBitWidth); | ||||
2888 | DesignatedStartIndex.setIsUnsigned(true); | ||||
2889 | DesignatedEndIndex.setIsUnsigned(true); | ||||
2890 | } | ||||
2891 | |||||
2892 | bool IsStringLiteralInitUpdate = | ||||
2893 | StructuredList && StructuredList->isStringLiteralInit(); | ||||
2894 | if (IsStringLiteralInitUpdate && VerifyOnly) { | ||||
2895 | // We're just verifying an update to a string literal init. We don't need | ||||
2896 | // to split the string up into individual characters to do that. | ||||
2897 | StructuredList = nullptr; | ||||
2898 | } else if (IsStringLiteralInitUpdate) { | ||||
2899 | // We're modifying a string literal init; we have to decompose the string | ||||
2900 | // so we can modify the individual characters. | ||||
2901 | ASTContext &Context = SemaRef.Context; | ||||
2902 | Expr *SubExpr = StructuredList->getInit(0)->IgnoreParenImpCasts(); | ||||
2903 | |||||
2904 | // Compute the character type | ||||
2905 | QualType CharTy = AT->getElementType(); | ||||
2906 | |||||
2907 | // Compute the type of the integer literals. | ||||
2908 | QualType PromotedCharTy = CharTy; | ||||
2909 | if (CharTy->isPromotableIntegerType()) | ||||
2910 | PromotedCharTy = Context.getPromotedIntegerType(CharTy); | ||||
2911 | unsigned PromotedCharTyWidth = Context.getTypeSize(PromotedCharTy); | ||||
2912 | |||||
2913 | if (StringLiteral *SL = dyn_cast<StringLiteral>(SubExpr)) { | ||||
2914 | // Get the length of the string. | ||||
2915 | uint64_t StrLen = SL->getLength(); | ||||
2916 | if (cast<ConstantArrayType>(AT)->getSize().ult(StrLen)) | ||||
2917 | StrLen = cast<ConstantArrayType>(AT)->getSize().getZExtValue(); | ||||
2918 | StructuredList->resizeInits(Context, StrLen); | ||||
2919 | |||||
2920 | // Build a literal for each character in the string, and put them into | ||||
2921 | // the init list. | ||||
2922 | for (unsigned i = 0, e = StrLen; i != e; ++i) { | ||||
2923 | llvm::APInt CodeUnit(PromotedCharTyWidth, SL->getCodeUnit(i)); | ||||
2924 | Expr *Init = new (Context) IntegerLiteral( | ||||
2925 | Context, CodeUnit, PromotedCharTy, SubExpr->getExprLoc()); | ||||
2926 | if (CharTy != PromotedCharTy) | ||||
2927 | Init = ImplicitCastExpr::Create(Context, CharTy, CK_IntegralCast, | ||||
2928 | Init, nullptr, VK_PRValue, | ||||
2929 | FPOptionsOverride()); | ||||
2930 | StructuredList->updateInit(Context, i, Init); | ||||
2931 | } | ||||
2932 | } else { | ||||
2933 | ObjCEncodeExpr *E = cast<ObjCEncodeExpr>(SubExpr); | ||||
2934 | std::string Str; | ||||
2935 | Context.getObjCEncodingForType(E->getEncodedType(), Str); | ||||
2936 | |||||
2937 | // Get the length of the string. | ||||
2938 | uint64_t StrLen = Str.size(); | ||||
2939 | if (cast<ConstantArrayType>(AT)->getSize().ult(StrLen)) | ||||
2940 | StrLen = cast<ConstantArrayType>(AT)->getSize().getZExtValue(); | ||||
2941 | StructuredList->resizeInits(Context, StrLen); | ||||
2942 | |||||
2943 | // Build a literal for each character in the string, and put them into | ||||
2944 | // the init list. | ||||
2945 | for (unsigned i = 0, e = StrLen; i != e; ++i) { | ||||
2946 | llvm::APInt CodeUnit(PromotedCharTyWidth, Str[i]); | ||||
2947 | Expr *Init = new (Context) IntegerLiteral( | ||||
2948 | Context, CodeUnit, PromotedCharTy, SubExpr->getExprLoc()); | ||||
2949 | if (CharTy != PromotedCharTy) | ||||
2950 | Init = ImplicitCastExpr::Create(Context, CharTy, CK_IntegralCast, | ||||
2951 | Init, nullptr, VK_PRValue, | ||||
2952 | FPOptionsOverride()); | ||||
2953 | StructuredList->updateInit(Context, i, Init); | ||||
2954 | } | ||||
2955 | } | ||||
2956 | } | ||||
2957 | |||||
2958 | // Make sure that our non-designated initializer list has space | ||||
2959 | // for a subobject corresponding to this array element. | ||||
2960 | if (StructuredList && | ||||
2961 | DesignatedEndIndex.getZExtValue() >= StructuredList->getNumInits()) | ||||
2962 | StructuredList->resizeInits(SemaRef.Context, | ||||
2963 | DesignatedEndIndex.getZExtValue() + 1); | ||||
2964 | |||||
2965 | // Repeatedly perform subobject initializations in the range | ||||
2966 | // [DesignatedStartIndex, DesignatedEndIndex]. | ||||
2967 | |||||
2968 | // Move to the next designator | ||||
2969 | unsigned ElementIndex = DesignatedStartIndex.getZExtValue(); | ||||
2970 | unsigned OldIndex = Index; | ||||
2971 | |||||
2972 | InitializedEntity ElementEntity = | ||||
2973 | InitializedEntity::InitializeElement(SemaRef.Context, 0, Entity); | ||||
2974 | |||||
2975 | while (DesignatedStartIndex <= DesignatedEndIndex) { | ||||
2976 | // Recurse to check later designated subobjects. | ||||
2977 | QualType ElementType = AT->getElementType(); | ||||
2978 | Index = OldIndex; | ||||
2979 | |||||
2980 | ElementEntity.setElementIndex(ElementIndex); | ||||
2981 | if (CheckDesignatedInitializer( | ||||
2982 | ElementEntity, IList, DIE, DesigIdx + 1, ElementType, nullptr, | ||||
2983 | nullptr, Index, StructuredList, ElementIndex, | ||||
2984 | FinishSubobjectInit && (DesignatedStartIndex == DesignatedEndIndex), | ||||
2985 | false)) | ||||
2986 | return true; | ||||
2987 | |||||
2988 | // Move to the next index in the array that we'll be initializing. | ||||
2989 | ++DesignatedStartIndex; | ||||
2990 | ElementIndex = DesignatedStartIndex.getZExtValue(); | ||||
2991 | } | ||||
2992 | |||||
2993 | // If this the first designator, our caller will continue checking | ||||
2994 | // the rest of this array subobject. | ||||
2995 | if (IsFirstDesignator) { | ||||
2996 | if (NextElementIndex) | ||||
2997 | *NextElementIndex = DesignatedStartIndex; | ||||
2998 | StructuredIndex = ElementIndex; | ||||
2999 | return false; | ||||
3000 | } | ||||
3001 | |||||
3002 | if (!FinishSubobjectInit) | ||||
3003 | return false; | ||||
3004 | |||||
3005 | // Check the remaining elements within this array subobject. | ||||
3006 | bool prevHadError = hadError; | ||||
3007 | CheckArrayType(Entity, IList, CurrentObjectType, DesignatedStartIndex, | ||||
3008 | /*SubobjectIsDesignatorContext=*/false, Index, | ||||
3009 | StructuredList, ElementIndex); | ||||
3010 | return hadError && !prevHadError; | ||||
3011 | } | ||||
3012 | |||||
3013 | // Get the structured initializer list for a subobject of type | ||||
3014 | // @p CurrentObjectType. | ||||
3015 | InitListExpr * | ||||
3016 | InitListChecker::getStructuredSubobjectInit(InitListExpr *IList, unsigned Index, | ||||
3017 | QualType CurrentObjectType, | ||||
3018 | InitListExpr *StructuredList, | ||||
3019 | unsigned StructuredIndex, | ||||
3020 | SourceRange InitRange, | ||||
3021 | bool IsFullyOverwritten) { | ||||
3022 | if (!StructuredList) | ||||
3023 | return nullptr; | ||||
3024 | |||||
3025 | Expr *ExistingInit = nullptr; | ||||
3026 | if (StructuredIndex < StructuredList->getNumInits()) | ||||
3027 | ExistingInit = StructuredList->getInit(StructuredIndex); | ||||
3028 | |||||
3029 | if (InitListExpr *Result = dyn_cast_or_null<InitListExpr>(ExistingInit)) | ||||
3030 | // There might have already been initializers for subobjects of the current | ||||
3031 | // object, but a subsequent initializer list will overwrite the entirety | ||||
3032 | // of the current object. (See DR 253 and C99 6.7.8p21). e.g., | ||||
3033 | // | ||||
3034 | // struct P { char x[6]; }; | ||||
3035 | // struct P l = { .x[2] = 'x', .x = { [0] = 'f' } }; | ||||
3036 | // | ||||
3037 | // The first designated initializer is ignored, and l.x is just "f". | ||||
3038 | if (!IsFullyOverwritten) | ||||
3039 | return Result; | ||||
3040 | |||||
3041 | if (ExistingInit) { | ||||
3042 | // We are creating an initializer list that initializes the | ||||
3043 | // subobjects of the current object, but there was already an | ||||
3044 | // initialization that completely initialized the current | ||||
3045 | // subobject: | ||||
3046 | // | ||||
3047 | // struct X { int a, b; }; | ||||
3048 | // struct X xs[] = { [0] = { 1, 2 }, [0].b = 3 }; | ||||
3049 | // | ||||
3050 | // Here, xs[0].a == 1 and xs[0].b == 3, since the second, | ||||
3051 | // designated initializer overwrites the [0].b initializer | ||||
3052 | // from the prior initialization. | ||||
3053 | // | ||||
3054 | // When the existing initializer is an expression rather than an | ||||
3055 | // initializer list, we cannot decompose and update it in this way. | ||||
3056 | // For example: | ||||
3057 | // | ||||
3058 | // struct X xs[] = { [0] = (struct X) { 1, 2 }, [0].b = 3 }; | ||||
3059 | // | ||||
3060 | // This case is handled by CheckDesignatedInitializer. | ||||
3061 | diagnoseInitOverride(ExistingInit, InitRange); | ||||
3062 | } | ||||
3063 | |||||
3064 | unsigned ExpectedNumInits = 0; | ||||
3065 | if (Index < IList->getNumInits()) { | ||||
3066 | if (auto *Init = dyn_cast_or_null<InitListExpr>(IList->getInit(Index))) | ||||
3067 | ExpectedNumInits = Init->getNumInits(); | ||||
3068 | else | ||||
3069 | ExpectedNumInits = IList->getNumInits() - Index; | ||||
3070 | } | ||||
3071 | |||||
3072 | InitListExpr *Result = | ||||
3073 | createInitListExpr(CurrentObjectType, InitRange, ExpectedNumInits); | ||||
3074 | |||||
3075 | // Link this new initializer list into the structured initializer | ||||
3076 | // lists. | ||||
3077 | StructuredList->updateInit(SemaRef.Context, StructuredIndex, Result); | ||||
3078 | return Result; | ||||
3079 | } | ||||
3080 | |||||
3081 | InitListExpr * | ||||
3082 | InitListChecker::createInitListExpr(QualType CurrentObjectType, | ||||
3083 | SourceRange InitRange, | ||||
3084 | unsigned ExpectedNumInits) { | ||||
3085 | InitListExpr *Result | ||||
3086 | = new (SemaRef.Context) InitListExpr(SemaRef.Context, | ||||
3087 | InitRange.getBegin(), None, | ||||
3088 | InitRange.getEnd()); | ||||
3089 | |||||
3090 | QualType ResultType = CurrentObjectType; | ||||
3091 | if (!ResultType->isArrayType()) | ||||
3092 | ResultType = ResultType.getNonLValueExprType(SemaRef.Context); | ||||
3093 | Result->setType(ResultType); | ||||
3094 | |||||
3095 | // Pre-allocate storage for the structured initializer list. | ||||
3096 | unsigned NumElements = 0; | ||||
3097 | |||||
3098 | if (const ArrayType *AType | ||||
3099 | = SemaRef.Context.getAsArrayType(CurrentObjectType)) { | ||||
3100 | if (const ConstantArrayType *CAType = dyn_cast<ConstantArrayType>(AType)) { | ||||
3101 | NumElements = CAType->getSize().getZExtValue(); | ||||
3102 | // Simple heuristic so that we don't allocate a very large | ||||
3103 | // initializer with many empty entries at the end. | ||||
3104 | if (NumElements > ExpectedNumInits) | ||||
3105 | NumElements = 0; | ||||
3106 | } | ||||
3107 | } else if (const VectorType *VType = CurrentObjectType->getAs<VectorType>()) { | ||||
3108 | NumElements = VType->getNumElements(); | ||||
3109 | } else if (CurrentObjectType->isRecordType()) { | ||||
3110 | NumElements = numStructUnionElements(CurrentObjectType); | ||||
3111 | } | ||||
3112 | |||||
3113 | Result->reserveInits(SemaRef.Context, NumElements); | ||||
3114 | |||||
3115 | return Result; | ||||
3116 | } | ||||
3117 | |||||
3118 | /// Update the initializer at index @p StructuredIndex within the | ||||
3119 | /// structured initializer list to the value @p expr. | ||||
3120 | void InitListChecker::UpdateStructuredListElement(InitListExpr *StructuredList, | ||||
3121 | unsigned &StructuredIndex, | ||||
3122 | Expr *expr) { | ||||
3123 | // No structured initializer list to update | ||||
3124 | if (!StructuredList) | ||||
3125 | return; | ||||
3126 | |||||
3127 | if (Expr *PrevInit = StructuredList->updateInit(SemaRef.Context, | ||||
3128 | StructuredIndex, expr)) { | ||||
3129 | // This initializer overwrites a previous initializer. | ||||
3130 | // No need to diagnose when `expr` is nullptr because a more relevant | ||||
3131 | // diagnostic has already been issued and this diagnostic is potentially | ||||
3132 | // noise. | ||||
3133 | if (expr) | ||||
3134 | diagnoseInitOverride(PrevInit, expr->getSourceRange()); | ||||
3135 | } | ||||
3136 | |||||
3137 | ++StructuredIndex; | ||||
3138 | } | ||||
3139 | |||||
3140 | /// Determine whether we can perform aggregate initialization for the purposes | ||||
3141 | /// of overload resolution. | ||||
3142 | bool Sema::CanPerformAggregateInitializationForOverloadResolution( | ||||
3143 | const InitializedEntity &Entity, InitListExpr *From) { | ||||
3144 | QualType Type = Entity.getType(); | ||||
3145 | InitListChecker Check(*this, Entity, From, Type, /*VerifyOnly=*/true, | ||||
3146 | /*TreatUnavailableAsInvalid=*/false, | ||||
3147 | /*InOverloadResolution=*/true); | ||||
3148 | return !Check.HadError(); | ||||
3149 | } | ||||
3150 | |||||
3151 | /// Check that the given Index expression is a valid array designator | ||||
3152 | /// value. This is essentially just a wrapper around | ||||
3153 | /// VerifyIntegerConstantExpression that also checks for negative values | ||||
3154 | /// and produces a reasonable diagnostic if there is a | ||||
3155 | /// failure. Returns the index expression, possibly with an implicit cast | ||||
3156 | /// added, on success. If everything went okay, Value will receive the | ||||
3157 | /// value of the constant expression. | ||||
3158 | static ExprResult | ||||
3159 | CheckArrayDesignatorExpr(Sema &S, Expr *Index, llvm::APSInt &Value) { | ||||
3160 | SourceLocation Loc = Index->getBeginLoc(); | ||||
3161 | |||||
3162 | // Make sure this is an integer constant expression. | ||||
3163 | ExprResult Result = | ||||
3164 | S.VerifyIntegerConstantExpression(Index, &Value, Sema::AllowFold); | ||||
3165 | if (Result.isInvalid()) | ||||
3166 | return Result; | ||||
3167 | |||||
3168 | if (Value.isSigned() && Value.isNegative()) | ||||
3169 | return S.Diag(Loc, diag::err_array_designator_negative) | ||||
3170 | << toString(Value, 10) << Index->getSourceRange(); | ||||
3171 | |||||
3172 | Value.setIsUnsigned(true); | ||||
3173 | return Result; | ||||
3174 | } | ||||
3175 | |||||
3176 | ExprResult Sema::ActOnDesignatedInitializer(Designation &Desig, | ||||
3177 | SourceLocation EqualOrColonLoc, | ||||
3178 | bool GNUSyntax, | ||||
3179 | ExprResult Init) { | ||||
3180 | typedef DesignatedInitExpr::Designator ASTDesignator; | ||||
3181 | |||||
3182 | bool Invalid = false; | ||||
3183 | SmallVector<ASTDesignator, 32> Designators; | ||||
3184 | SmallVector<Expr *, 32> InitExpressions; | ||||
3185 | |||||
3186 | // Build designators and check array designator expressions. | ||||
3187 | for (unsigned Idx = 0; Idx < Desig.getNumDesignators(); ++Idx) { | ||||
3188 | const Designator &D = Desig.getDesignator(Idx); | ||||
3189 | switch (D.getKind()) { | ||||
3190 | case Designator::FieldDesignator: | ||||
3191 | Designators.push_back(ASTDesignator(D.getField(), D.getDotLoc(), | ||||
3192 | D.getFieldLoc())); | ||||
3193 | break; | ||||
3194 | |||||
3195 | case Designator::ArrayDesignator: { | ||||
3196 | Expr *Index = static_cast<Expr *>(D.getArrayIndex()); | ||||
3197 | llvm::APSInt IndexValue; | ||||
3198 | if (!Index->isTypeDependent() && !Index->isValueDependent()) | ||||
3199 | Index = CheckArrayDesignatorExpr(*this, Index, IndexValue).get(); | ||||
3200 | if (!Index) | ||||
3201 | Invalid = true; | ||||
3202 | else { | ||||
3203 | Designators.push_back(ASTDesignator(InitExpressions.size(), | ||||
3204 | D.getLBracketLoc(), | ||||
3205 | D.getRBracketLoc())); | ||||
3206 | InitExpressions.push_back(Index); | ||||
3207 | } | ||||
3208 | break; | ||||
3209 | } | ||||
3210 | |||||
3211 | case Designator::ArrayRangeDesignator: { | ||||
3212 | Expr *StartIndex = static_cast<Expr *>(D.getArrayRangeStart()); | ||||
3213 | Expr *EndIndex = static_cast<Expr *>(D.getArrayRangeEnd()); | ||||
3214 | llvm::APSInt StartValue; | ||||
3215 | llvm::APSInt EndValue; | ||||
3216 | bool StartDependent = StartIndex->isTypeDependent() || | ||||
3217 | StartIndex->isValueDependent(); | ||||
3218 | bool EndDependent = EndIndex->isTypeDependent() || | ||||
3219 | EndIndex->isValueDependent(); | ||||
3220 | if (!StartDependent) | ||||
3221 | StartIndex = | ||||
3222 | CheckArrayDesignatorExpr(*this, StartIndex, StartValue).get(); | ||||
3223 | if (!EndDependent) | ||||
3224 | EndIndex = CheckArrayDesignatorExpr(*this, EndIndex, EndValue).get(); | ||||
3225 | |||||
3226 | if (!StartIndex || !EndIndex) | ||||
3227 | Invalid = true; | ||||
3228 | else { | ||||
3229 | // Make sure we're comparing values with the same bit width. | ||||
3230 | if (StartDependent || EndDependent) { | ||||
3231 | // Nothing to compute. | ||||
3232 | } else if (StartValue.getBitWidth() > EndValue.getBitWidth()) | ||||
3233 | EndValue = EndValue.extend(StartValue.getBitWidth()); | ||||
3234 | else if (StartValue.getBitWidth() < EndValue.getBitWidth()) | ||||
3235 | StartValue = StartValue.extend(EndValue.getBitWidth()); | ||||
3236 | |||||
3237 | if (!StartDependent && !EndDependent && EndValue < StartValue) { | ||||
3238 | Diag(D.getEllipsisLoc(), diag::err_array_designator_empty_range) | ||||
3239 | << toString(StartValue, 10) << toString(EndValue, 10) | ||||
3240 | << StartIndex->getSourceRange() << EndIndex->getSourceRange(); | ||||
3241 | Invalid = true; | ||||
3242 | } else { | ||||
3243 | Designators.push_back(ASTDesignator(InitExpressions.size(), | ||||
3244 | D.getLBracketLoc(), | ||||
3245 | D.getEllipsisLoc(), | ||||
3246 | D.getRBracketLoc())); | ||||
3247 | InitExpressions.push_back(StartIndex); | ||||
3248 | InitExpressions.push_back(EndIndex); | ||||
3249 | } | ||||
3250 | } | ||||
3251 | break; | ||||
3252 | } | ||||
3253 | } | ||||
3254 | } | ||||
3255 | |||||
3256 | if (Invalid || Init.isInvalid()) | ||||
3257 | return ExprError(); | ||||
3258 | |||||
3259 | // Clear out the expressions within the designation. | ||||
3260 | Desig.ClearExprs(*this); | ||||
3261 | |||||
3262 | return DesignatedInitExpr::Create(Context, Designators, InitExpressions, | ||||
3263 | EqualOrColonLoc, GNUSyntax, | ||||
3264 | Init.getAs<Expr>()); | ||||
3265 | } | ||||
3266 | |||||
3267 | //===----------------------------------------------------------------------===// | ||||
3268 | // Initialization entity | ||||
3269 | //===----------------------------------------------------------------------===// | ||||
3270 | |||||
3271 | InitializedEntity::InitializedEntity(ASTContext &Context, unsigned Index, | ||||
3272 | const InitializedEntity &Parent) | ||||
3273 | : Parent(&Parent), Index(Index) | ||||
3274 | { | ||||
3275 | if (const ArrayType *AT = Context.getAsArrayType(Parent.getType())) { | ||||
3276 | Kind = EK_ArrayElement; | ||||
3277 | Type = AT->getElementType(); | ||||
3278 | } else if (const VectorType *VT = Parent.getType()->getAs<VectorType>()) { | ||||
3279 | Kind = EK_VectorElement; | ||||
3280 | Type = VT->getElementType(); | ||||
3281 | } else { | ||||
3282 | const ComplexType *CT = Parent.getType()->getAs<ComplexType>(); | ||||
3283 | assert(CT && "Unexpected type")(static_cast <bool> (CT && "Unexpected type") ? void (0) : __assert_fail ("CT && \"Unexpected type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3283, __extension__ __PRETTY_FUNCTION__)); | ||||
3284 | Kind = EK_ComplexElement; | ||||
3285 | Type = CT->getElementType(); | ||||
3286 | } | ||||
3287 | } | ||||
3288 | |||||
3289 | InitializedEntity | ||||
3290 | InitializedEntity::InitializeBase(ASTContext &Context, | ||||
3291 | const CXXBaseSpecifier *Base, | ||||
3292 | bool IsInheritedVirtualBase, | ||||
3293 | const InitializedEntity *Parent) { | ||||
3294 | InitializedEntity Result; | ||||
3295 | Result.Kind = EK_Base; | ||||
3296 | Result.Parent = Parent; | ||||
3297 | Result.Base = {Base, IsInheritedVirtualBase}; | ||||
3298 | Result.Type = Base->getType(); | ||||
3299 | return Result; | ||||
3300 | } | ||||
3301 | |||||
3302 | DeclarationName InitializedEntity::getName() const { | ||||
3303 | switch (getKind()) { | ||||
3304 | case EK_Parameter: | ||||
3305 | case EK_Parameter_CF_Audited: { | ||||
3306 | ParmVarDecl *D = Parameter.getPointer(); | ||||
3307 | return (D ? D->getDeclName() : DeclarationName()); | ||||
3308 | } | ||||
3309 | |||||
3310 | case EK_Variable: | ||||
3311 | case EK_Member: | ||||
3312 | case EK_Binding: | ||||
3313 | case EK_TemplateParameter: | ||||
3314 | return Variable.VariableOrMember->getDeclName(); | ||||
3315 | |||||
3316 | case EK_LambdaCapture: | ||||
3317 | return DeclarationName(Capture.VarID); | ||||
3318 | |||||
3319 | case EK_Result: | ||||
3320 | case EK_StmtExprResult: | ||||
3321 | case EK_Exception: | ||||
3322 | case EK_New: | ||||
3323 | case EK_Temporary: | ||||
3324 | case EK_Base: | ||||
3325 | case EK_Delegating: | ||||
3326 | case EK_ArrayElement: | ||||
3327 | case EK_VectorElement: | ||||
3328 | case EK_ComplexElement: | ||||
3329 | case EK_BlockElement: | ||||
3330 | case EK_LambdaToBlockConversionBlockElement: | ||||
3331 | case EK_CompoundLiteralInit: | ||||
3332 | case EK_RelatedResult: | ||||
3333 | return DeclarationName(); | ||||
3334 | } | ||||
3335 | |||||
3336 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3336); | ||||
3337 | } | ||||
3338 | |||||
3339 | ValueDecl *InitializedEntity::getDecl() const { | ||||
3340 | switch (getKind()) { | ||||
3341 | case EK_Variable: | ||||
3342 | case EK_Member: | ||||
3343 | case EK_Binding: | ||||
3344 | case EK_TemplateParameter: | ||||
3345 | return Variable.VariableOrMember; | ||||
3346 | |||||
3347 | case EK_Parameter: | ||||
3348 | case EK_Parameter_CF_Audited: | ||||
3349 | return Parameter.getPointer(); | ||||
3350 | |||||
3351 | case EK_Result: | ||||
3352 | case EK_StmtExprResult: | ||||
3353 | case EK_Exception: | ||||
3354 | case EK_New: | ||||
3355 | case EK_Temporary: | ||||
3356 | case EK_Base: | ||||
3357 | case EK_Delegating: | ||||
3358 | case EK_ArrayElement: | ||||
3359 | case EK_VectorElement: | ||||
3360 | case EK_ComplexElement: | ||||
3361 | case EK_BlockElement: | ||||
3362 | case EK_LambdaToBlockConversionBlockElement: | ||||
3363 | case EK_LambdaCapture: | ||||
3364 | case EK_CompoundLiteralInit: | ||||
3365 | case EK_RelatedResult: | ||||
3366 | return nullptr; | ||||
3367 | } | ||||
3368 | |||||
3369 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3369); | ||||
3370 | } | ||||
3371 | |||||
3372 | bool InitializedEntity::allowsNRVO() const { | ||||
3373 | switch (getKind()) { | ||||
3374 | case EK_Result: | ||||
3375 | case EK_Exception: | ||||
3376 | return LocAndNRVO.NRVO; | ||||
3377 | |||||
3378 | case EK_StmtExprResult: | ||||
3379 | case EK_Variable: | ||||
3380 | case EK_Parameter: | ||||
3381 | case EK_Parameter_CF_Audited: | ||||
3382 | case EK_TemplateParameter: | ||||
3383 | case EK_Member: | ||||
3384 | case EK_Binding: | ||||
3385 | case EK_New: | ||||
3386 | case EK_Temporary: | ||||
3387 | case EK_CompoundLiteralInit: | ||||
3388 | case EK_Base: | ||||
3389 | case EK_Delegating: | ||||
3390 | case EK_ArrayElement: | ||||
3391 | case EK_VectorElement: | ||||
3392 | case EK_ComplexElement: | ||||
3393 | case EK_BlockElement: | ||||
3394 | case EK_LambdaToBlockConversionBlockElement: | ||||
3395 | case EK_LambdaCapture: | ||||
3396 | case EK_RelatedResult: | ||||
3397 | break; | ||||
3398 | } | ||||
3399 | |||||
3400 | return false; | ||||
3401 | } | ||||
3402 | |||||
3403 | unsigned InitializedEntity::dumpImpl(raw_ostream &OS) const { | ||||
3404 | assert(getParent() != this)(static_cast <bool> (getParent() != this) ? void (0) : __assert_fail ("getParent() != this", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3404, __extension__ __PRETTY_FUNCTION__)); | ||||
3405 | unsigned Depth = getParent() ? getParent()->dumpImpl(OS) : 0; | ||||
3406 | for (unsigned I = 0; I != Depth; ++I) | ||||
3407 | OS << "`-"; | ||||
3408 | |||||
3409 | switch (getKind()) { | ||||
3410 | case EK_Variable: OS << "Variable"; break; | ||||
3411 | case EK_Parameter: OS << "Parameter"; break; | ||||
3412 | case EK_Parameter_CF_Audited: OS << "CF audited function Parameter"; | ||||
3413 | break; | ||||
3414 | case EK_TemplateParameter: OS << "TemplateParameter"; break; | ||||
3415 | case EK_Result: OS << "Result"; break; | ||||
3416 | case EK_StmtExprResult: OS << "StmtExprResult"; break; | ||||
3417 | case EK_Exception: OS << "Exception"; break; | ||||
3418 | case EK_Member: OS << "Member"; break; | ||||
3419 | case EK_Binding: OS << "Binding"; break; | ||||
3420 | case EK_New: OS << "New"; break; | ||||
3421 | case EK_Temporary: OS << "Temporary"; break; | ||||
3422 | case EK_CompoundLiteralInit: OS << "CompoundLiteral";break; | ||||
3423 | case EK_RelatedResult: OS << "RelatedResult"; break; | ||||
3424 | case EK_Base: OS << "Base"; break; | ||||
3425 | case EK_Delegating: OS << "Delegating"; break; | ||||
3426 | case EK_ArrayElement: OS << "ArrayElement " << Index; break; | ||||
3427 | case EK_VectorElement: OS << "VectorElement " << Index; break; | ||||
3428 | case EK_ComplexElement: OS << "ComplexElement " << Index; break; | ||||
3429 | case EK_BlockElement: OS << "Block"; break; | ||||
3430 | case EK_LambdaToBlockConversionBlockElement: | ||||
3431 | OS << "Block (lambda)"; | ||||
3432 | break; | ||||
3433 | case EK_LambdaCapture: | ||||
3434 | OS << "LambdaCapture "; | ||||
3435 | OS << DeclarationName(Capture.VarID); | ||||
3436 | break; | ||||
3437 | } | ||||
3438 | |||||
3439 | if (auto *D = getDecl()) { | ||||
3440 | OS << " "; | ||||
3441 | D->printQualifiedName(OS); | ||||
3442 | } | ||||
3443 | |||||
3444 | OS << " '" << getType().getAsString() << "'\n"; | ||||
3445 | |||||
3446 | return Depth + 1; | ||||
3447 | } | ||||
3448 | |||||
3449 | LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void InitializedEntity::dump() const { | ||||
3450 | dumpImpl(llvm::errs()); | ||||
3451 | } | ||||
3452 | |||||
3453 | //===----------------------------------------------------------------------===// | ||||
3454 | // Initialization sequence | ||||
3455 | //===----------------------------------------------------------------------===// | ||||
3456 | |||||
3457 | void InitializationSequence::Step::Destroy() { | ||||
3458 | switch (Kind) { | ||||
3459 | case SK_ResolveAddressOfOverloadedFunction: | ||||
3460 | case SK_CastDerivedToBasePRValue: | ||||
3461 | case SK_CastDerivedToBaseXValue: | ||||
3462 | case SK_CastDerivedToBaseLValue: | ||||
3463 | case SK_BindReference: | ||||
3464 | case SK_BindReferenceToTemporary: | ||||
3465 | case SK_FinalCopy: | ||||
3466 | case SK_ExtraneousCopyToTemporary: | ||||
3467 | case SK_UserConversion: | ||||
3468 | case SK_QualificationConversionPRValue: | ||||
3469 | case SK_QualificationConversionXValue: | ||||
3470 | case SK_QualificationConversionLValue: | ||||
3471 | case SK_FunctionReferenceConversion: | ||||
3472 | case SK_AtomicConversion: | ||||
3473 | case SK_ListInitialization: | ||||
3474 | case SK_UnwrapInitList: | ||||
3475 | case SK_RewrapInitList: | ||||
3476 | case SK_ConstructorInitialization: | ||||
3477 | case SK_ConstructorInitializationFromList: | ||||
3478 | case SK_ZeroInitialization: | ||||
3479 | case SK_CAssignment: | ||||
3480 | case SK_StringInit: | ||||
3481 | case SK_ObjCObjectConversion: | ||||
3482 | case SK_ArrayLoopIndex: | ||||
3483 | case SK_ArrayLoopInit: | ||||
3484 | case SK_ArrayInit: | ||||
3485 | case SK_GNUArrayInit: | ||||
3486 | case SK_ParenthesizedArrayInit: | ||||
3487 | case SK_PassByIndirectCopyRestore: | ||||
3488 | case SK_PassByIndirectRestore: | ||||
3489 | case SK_ProduceObjCObject: | ||||
3490 | case SK_StdInitializerList: | ||||
3491 | case SK_StdInitializerListConstructorCall: | ||||
3492 | case SK_OCLSamplerInit: | ||||
3493 | case SK_OCLZeroOpaqueType: | ||||
3494 | break; | ||||
3495 | |||||
3496 | case SK_ConversionSequence: | ||||
3497 | case SK_ConversionSequenceNoNarrowing: | ||||
3498 | delete ICS; | ||||
3499 | } | ||||
3500 | } | ||||
3501 | |||||
3502 | bool InitializationSequence::isDirectReferenceBinding() const { | ||||
3503 | // There can be some lvalue adjustments after the SK_BindReference step. | ||||
3504 | for (auto I = Steps.rbegin(); I != Steps.rend(); ++I) { | ||||
3505 | if (I->Kind == SK_BindReference) | ||||
3506 | return true; | ||||
3507 | if (I->Kind == SK_BindReferenceToTemporary) | ||||
3508 | return false; | ||||
3509 | } | ||||
3510 | return false; | ||||
3511 | } | ||||
3512 | |||||
3513 | bool InitializationSequence::isAmbiguous() const { | ||||
3514 | if (!Failed()) | ||||
3515 | return false; | ||||
3516 | |||||
3517 | switch (getFailureKind()) { | ||||
3518 | case FK_TooManyInitsForReference: | ||||
3519 | case FK_ParenthesizedListInitForReference: | ||||
3520 | case FK_ArrayNeedsInitList: | ||||
3521 | case FK_ArrayNeedsInitListOrStringLiteral: | ||||
3522 | case FK_ArrayNeedsInitListOrWideStringLiteral: | ||||
3523 | case FK_NarrowStringIntoWideCharArray: | ||||
3524 | case FK_WideStringIntoCharArray: | ||||
3525 | case FK_IncompatWideStringIntoWideChar: | ||||
3526 | case FK_PlainStringIntoUTF8Char: | ||||
3527 | case FK_UTF8StringIntoPlainChar: | ||||
3528 | case FK_AddressOfOverloadFailed: // FIXME: Could do better | ||||
3529 | case FK_NonConstLValueReferenceBindingToTemporary: | ||||
3530 | case FK_NonConstLValueReferenceBindingToBitfield: | ||||
3531 | case FK_NonConstLValueReferenceBindingToVectorElement: | ||||
3532 | case FK_NonConstLValueReferenceBindingToMatrixElement: | ||||
3533 | case FK_NonConstLValueReferenceBindingToUnrelated: | ||||
3534 | case FK_RValueReferenceBindingToLValue: | ||||
3535 | case FK_ReferenceAddrspaceMismatchTemporary: | ||||
3536 | case FK_ReferenceInitDropsQualifiers: | ||||
3537 | case FK_ReferenceInitFailed: | ||||
3538 | case FK_ConversionFailed: | ||||
3539 | case FK_ConversionFromPropertyFailed: | ||||
3540 | case FK_TooManyInitsForScalar: | ||||
3541 | case FK_ParenthesizedListInitForScalar: | ||||
3542 | case FK_ReferenceBindingToInitList: | ||||
3543 | case FK_InitListBadDestinationType: | ||||
3544 | case FK_DefaultInitOfConst: | ||||
3545 | case FK_Incomplete: | ||||
3546 | case FK_ArrayTypeMismatch: | ||||
3547 | case FK_NonConstantArrayInit: | ||||
3548 | case FK_ListInitializationFailed: | ||||
3549 | case FK_VariableLengthArrayHasInitializer: | ||||
3550 | case FK_PlaceholderType: | ||||
3551 | case FK_ExplicitConstructor: | ||||
3552 | case FK_AddressOfUnaddressableFunction: | ||||
3553 | return false; | ||||
3554 | |||||
3555 | case FK_ReferenceInitOverloadFailed: | ||||
3556 | case FK_UserConversionOverloadFailed: | ||||
3557 | case FK_ConstructorOverloadFailed: | ||||
3558 | case FK_ListConstructorOverloadFailed: | ||||
3559 | return FailedOverloadResult == OR_Ambiguous; | ||||
3560 | } | ||||
3561 | |||||
3562 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3562); | ||||
3563 | } | ||||
3564 | |||||
3565 | bool InitializationSequence::isConstructorInitialization() const { | ||||
3566 | return !Steps.empty() && Steps.back().Kind == SK_ConstructorInitialization; | ||||
3567 | } | ||||
3568 | |||||
3569 | void | ||||
3570 | InitializationSequence | ||||
3571 | ::AddAddressOverloadResolutionStep(FunctionDecl *Function, | ||||
3572 | DeclAccessPair Found, | ||||
3573 | bool HadMultipleCandidates) { | ||||
3574 | Step S; | ||||
3575 | S.Kind = SK_ResolveAddressOfOverloadedFunction; | ||||
3576 | S.Type = Function->getType(); | ||||
3577 | S.Function.HadMultipleCandidates = HadMultipleCandidates; | ||||
3578 | S.Function.Function = Function; | ||||
3579 | S.Function.FoundDecl = Found; | ||||
3580 | Steps.push_back(S); | ||||
3581 | } | ||||
3582 | |||||
3583 | void InitializationSequence::AddDerivedToBaseCastStep(QualType BaseType, | ||||
3584 | ExprValueKind VK) { | ||||
3585 | Step S; | ||||
3586 | switch (VK) { | ||||
3587 | case VK_PRValue: | ||||
3588 | S.Kind = SK_CastDerivedToBasePRValue; | ||||
3589 | break; | ||||
3590 | case VK_XValue: S.Kind = SK_CastDerivedToBaseXValue; break; | ||||
3591 | case VK_LValue: S.Kind = SK_CastDerivedToBaseLValue; break; | ||||
3592 | } | ||||
3593 | S.Type = BaseType; | ||||
3594 | Steps.push_back(S); | ||||
3595 | } | ||||
3596 | |||||
3597 | void InitializationSequence::AddReferenceBindingStep(QualType T, | ||||
3598 | bool BindingTemporary) { | ||||
3599 | Step S; | ||||
3600 | S.Kind = BindingTemporary? SK_BindReferenceToTemporary : SK_BindReference; | ||||
3601 | S.Type = T; | ||||
3602 | Steps.push_back(S); | ||||
3603 | } | ||||
3604 | |||||
3605 | void InitializationSequence::AddFinalCopy(QualType T) { | ||||
3606 | Step S; | ||||
3607 | S.Kind = SK_FinalCopy; | ||||
3608 | S.Type = T; | ||||
3609 | Steps.push_back(S); | ||||
3610 | } | ||||
3611 | |||||
3612 | void InitializationSequence::AddExtraneousCopyToTemporary(QualType T) { | ||||
3613 | Step S; | ||||
3614 | S.Kind = SK_ExtraneousCopyToTemporary; | ||||
3615 | S.Type = T; | ||||
3616 | Steps.push_back(S); | ||||
3617 | } | ||||
3618 | |||||
3619 | void | ||||
3620 | InitializationSequence::AddUserConversionStep(FunctionDecl *Function, | ||||
3621 | DeclAccessPair FoundDecl, | ||||
3622 | QualType T, | ||||
3623 | bool HadMultipleCandidates) { | ||||
3624 | Step S; | ||||
3625 | S.Kind = SK_UserConversion; | ||||
3626 | S.Type = T; | ||||
3627 | S.Function.HadMultipleCandidates = HadMultipleCandidates; | ||||
3628 | S.Function.Function = Function; | ||||
3629 | S.Function.FoundDecl = FoundDecl; | ||||
3630 | Steps.push_back(S); | ||||
3631 | } | ||||
3632 | |||||
3633 | void InitializationSequence::AddQualificationConversionStep(QualType Ty, | ||||
3634 | ExprValueKind VK) { | ||||
3635 | Step S; | ||||
3636 | S.Kind = SK_QualificationConversionPRValue; // work around a gcc warning | ||||
3637 | switch (VK) { | ||||
3638 | case VK_PRValue: | ||||
3639 | S.Kind = SK_QualificationConversionPRValue; | ||||
3640 | break; | ||||
3641 | case VK_XValue: | ||||
3642 | S.Kind = SK_QualificationConversionXValue; | ||||
3643 | break; | ||||
3644 | case VK_LValue: | ||||
3645 | S.Kind = SK_QualificationConversionLValue; | ||||
3646 | break; | ||||
3647 | } | ||||
3648 | S.Type = Ty; | ||||
3649 | Steps.push_back(S); | ||||
3650 | } | ||||
3651 | |||||
3652 | void InitializationSequence::AddFunctionReferenceConversionStep(QualType Ty) { | ||||
3653 | Step S; | ||||
3654 | S.Kind = SK_FunctionReferenceConversion; | ||||
3655 | S.Type = Ty; | ||||
3656 | Steps.push_back(S); | ||||
3657 | } | ||||
3658 | |||||
3659 | void InitializationSequence::AddAtomicConversionStep(QualType Ty) { | ||||
3660 | Step S; | ||||
3661 | S.Kind = SK_AtomicConversion; | ||||
3662 | S.Type = Ty; | ||||
3663 | Steps.push_back(S); | ||||
3664 | } | ||||
3665 | |||||
3666 | void InitializationSequence::AddConversionSequenceStep( | ||||
3667 | const ImplicitConversionSequence &ICS, QualType T, | ||||
3668 | bool TopLevelOfInitList) { | ||||
3669 | Step S; | ||||
3670 | S.Kind = TopLevelOfInitList ? SK_ConversionSequenceNoNarrowing | ||||
3671 | : SK_ConversionSequence; | ||||
3672 | S.Type = T; | ||||
3673 | S.ICS = new ImplicitConversionSequence(ICS); | ||||
3674 | Steps.push_back(S); | ||||
3675 | } | ||||
3676 | |||||
3677 | void InitializationSequence::AddListInitializationStep(QualType T) { | ||||
3678 | Step S; | ||||
3679 | S.Kind = SK_ListInitialization; | ||||
3680 | S.Type = T; | ||||
3681 | Steps.push_back(S); | ||||
3682 | } | ||||
3683 | |||||
3684 | void InitializationSequence::AddConstructorInitializationStep( | ||||
3685 | DeclAccessPair FoundDecl, CXXConstructorDecl *Constructor, QualType T, | ||||
3686 | bool HadMultipleCandidates, bool FromInitList, bool AsInitList) { | ||||
3687 | Step S; | ||||
3688 | S.Kind = FromInitList ? AsInitList ? SK_StdInitializerListConstructorCall | ||||
3689 | : SK_ConstructorInitializationFromList | ||||
3690 | : SK_ConstructorInitialization; | ||||
3691 | S.Type = T; | ||||
3692 | S.Function.HadMultipleCandidates = HadMultipleCandidates; | ||||
3693 | S.Function.Function = Constructor; | ||||
3694 | S.Function.FoundDecl = FoundDecl; | ||||
3695 | Steps.push_back(S); | ||||
3696 | } | ||||
3697 | |||||
3698 | void InitializationSequence::AddZeroInitializationStep(QualType T) { | ||||
3699 | Step S; | ||||
3700 | S.Kind = SK_ZeroInitialization; | ||||
3701 | S.Type = T; | ||||
3702 | Steps.push_back(S); | ||||
3703 | } | ||||
3704 | |||||
3705 | void InitializationSequence::AddCAssignmentStep(QualType T) { | ||||
3706 | Step S; | ||||
3707 | S.Kind = SK_CAssignment; | ||||
3708 | S.Type = T; | ||||
3709 | Steps.push_back(S); | ||||
3710 | } | ||||
3711 | |||||
3712 | void InitializationSequence::AddStringInitStep(QualType T) { | ||||
3713 | Step S; | ||||
3714 | S.Kind = SK_StringInit; | ||||
3715 | S.Type = T; | ||||
3716 | Steps.push_back(S); | ||||
3717 | } | ||||
3718 | |||||
3719 | void InitializationSequence::AddObjCObjectConversionStep(QualType T) { | ||||
3720 | Step S; | ||||
3721 | S.Kind = SK_ObjCObjectConversion; | ||||
3722 | S.Type = T; | ||||
3723 | Steps.push_back(S); | ||||
3724 | } | ||||
3725 | |||||
3726 | void InitializationSequence::AddArrayInitStep(QualType T, bool IsGNUExtension) { | ||||
3727 | Step S; | ||||
3728 | S.Kind = IsGNUExtension ? SK_GNUArrayInit : SK_ArrayInit; | ||||
3729 | S.Type = T; | ||||
3730 | Steps.push_back(S); | ||||
3731 | } | ||||
3732 | |||||
3733 | void InitializationSequence::AddArrayInitLoopStep(QualType T, QualType EltT) { | ||||
3734 | Step S; | ||||
3735 | S.Kind = SK_ArrayLoopIndex; | ||||
3736 | S.Type = EltT; | ||||
3737 | Steps.insert(Steps.begin(), S); | ||||
3738 | |||||
3739 | S.Kind = SK_ArrayLoopInit; | ||||
3740 | S.Type = T; | ||||
3741 | Steps.push_back(S); | ||||
3742 | } | ||||
3743 | |||||
3744 | void InitializationSequence::AddParenthesizedArrayInitStep(QualType T) { | ||||
3745 | Step S; | ||||
3746 | S.Kind = SK_ParenthesizedArrayInit; | ||||
3747 | S.Type = T; | ||||
3748 | Steps.push_back(S); | ||||
3749 | } | ||||
3750 | |||||
3751 | void InitializationSequence::AddPassByIndirectCopyRestoreStep(QualType type, | ||||
3752 | bool shouldCopy) { | ||||
3753 | Step s; | ||||
3754 | s.Kind = (shouldCopy ? SK_PassByIndirectCopyRestore | ||||
3755 | : SK_PassByIndirectRestore); | ||||
3756 | s.Type = type; | ||||
3757 | Steps.push_back(s); | ||||
3758 | } | ||||
3759 | |||||
3760 | void InitializationSequence::AddProduceObjCObjectStep(QualType T) { | ||||
3761 | Step S; | ||||
3762 | S.Kind = SK_ProduceObjCObject; | ||||
3763 | S.Type = T; | ||||
3764 | Steps.push_back(S); | ||||
3765 | } | ||||
3766 | |||||
3767 | void InitializationSequence::AddStdInitializerListConstructionStep(QualType T) { | ||||
3768 | Step S; | ||||
3769 | S.Kind = SK_StdInitializerList; | ||||
3770 | S.Type = T; | ||||
3771 | Steps.push_back(S); | ||||
3772 | } | ||||
3773 | |||||
3774 | void InitializationSequence::AddOCLSamplerInitStep(QualType T) { | ||||
3775 | Step S; | ||||
3776 | S.Kind = SK_OCLSamplerInit; | ||||
3777 | S.Type = T; | ||||
3778 | Steps.push_back(S); | ||||
3779 | } | ||||
3780 | |||||
3781 | void InitializationSequence::AddOCLZeroOpaqueTypeStep(QualType T) { | ||||
3782 | Step S; | ||||
3783 | S.Kind = SK_OCLZeroOpaqueType; | ||||
3784 | S.Type = T; | ||||
3785 | Steps.push_back(S); | ||||
3786 | } | ||||
3787 | |||||
3788 | void InitializationSequence::RewrapReferenceInitList(QualType T, | ||||
3789 | InitListExpr *Syntactic) { | ||||
3790 | assert(Syntactic->getNumInits() == 1 &&(static_cast <bool> (Syntactic->getNumInits() == 1 && "Can only rewrap trivial init lists.") ? void (0) : __assert_fail ("Syntactic->getNumInits() == 1 && \"Can only rewrap trivial init lists.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3791, __extension__ __PRETTY_FUNCTION__)) | ||||
3791 | "Can only rewrap trivial init lists.")(static_cast <bool> (Syntactic->getNumInits() == 1 && "Can only rewrap trivial init lists.") ? void (0) : __assert_fail ("Syntactic->getNumInits() == 1 && \"Can only rewrap trivial init lists.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3791, __extension__ __PRETTY_FUNCTION__)); | ||||
3792 | Step S; | ||||
3793 | S.Kind = SK_UnwrapInitList; | ||||
3794 | S.Type = Syntactic->getInit(0)->getType(); | ||||
3795 | Steps.insert(Steps.begin(), S); | ||||
3796 | |||||
3797 | S.Kind = SK_RewrapInitList; | ||||
3798 | S.Type = T; | ||||
3799 | S.WrappingSyntacticList = Syntactic; | ||||
3800 | Steps.push_back(S); | ||||
3801 | } | ||||
3802 | |||||
3803 | void InitializationSequence::SetOverloadFailure(FailureKind Failure, | ||||
3804 | OverloadingResult Result) { | ||||
3805 | setSequenceKind(FailedSequence); | ||||
3806 | this->Failure = Failure; | ||||
3807 | this->FailedOverloadResult = Result; | ||||
3808 | } | ||||
3809 | |||||
3810 | //===----------------------------------------------------------------------===// | ||||
3811 | // Attempt initialization | ||||
3812 | //===----------------------------------------------------------------------===// | ||||
3813 | |||||
3814 | /// Tries to add a zero initializer. Returns true if that worked. | ||||
3815 | static bool | ||||
3816 | maybeRecoverWithZeroInitialization(Sema &S, InitializationSequence &Sequence, | ||||
3817 | const InitializedEntity &Entity) { | ||||
3818 | if (Entity.getKind() != InitializedEntity::EK_Variable) | ||||
3819 | return false; | ||||
3820 | |||||
3821 | VarDecl *VD = cast<VarDecl>(Entity.getDecl()); | ||||
3822 | if (VD->getInit() || VD->getEndLoc().isMacroID()) | ||||
3823 | return false; | ||||
3824 | |||||
3825 | QualType VariableTy = VD->getType().getCanonicalType(); | ||||
3826 | SourceLocation Loc = S.getLocForEndOfToken(VD->getEndLoc()); | ||||
3827 | std::string Init = S.getFixItZeroInitializerForType(VariableTy, Loc); | ||||
3828 | if (!Init.empty()) { | ||||
3829 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||
3830 | Sequence.SetZeroInitializationFixit(Init, Loc); | ||||
3831 | return true; | ||||
3832 | } | ||||
3833 | return false; | ||||
3834 | } | ||||
3835 | |||||
3836 | static void MaybeProduceObjCObject(Sema &S, | ||||
3837 | InitializationSequence &Sequence, | ||||
3838 | const InitializedEntity &Entity) { | ||||
3839 | if (!S.getLangOpts().ObjCAutoRefCount) return; | ||||
3840 | |||||
3841 | /// When initializing a parameter, produce the value if it's marked | ||||
3842 | /// __attribute__((ns_consumed)). | ||||
3843 | if (Entity.isParameterKind()) { | ||||
3844 | if (!Entity.isParameterConsumed()) | ||||
3845 | return; | ||||
3846 | |||||
3847 | assert(Entity.getType()->isObjCRetainableType() &&(static_cast <bool> (Entity.getType()->isObjCRetainableType () && "consuming an object of unretainable type?") ? void (0) : __assert_fail ("Entity.getType()->isObjCRetainableType() && \"consuming an object of unretainable type?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3848, __extension__ __PRETTY_FUNCTION__)) | ||||
3848 | "consuming an object of unretainable type?")(static_cast <bool> (Entity.getType()->isObjCRetainableType () && "consuming an object of unretainable type?") ? void (0) : __assert_fail ("Entity.getType()->isObjCRetainableType() && \"consuming an object of unretainable type?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 3848, __extension__ __PRETTY_FUNCTION__)); | ||||
3849 | Sequence.AddProduceObjCObjectStep(Entity.getType()); | ||||
3850 | |||||
3851 | /// When initializing a return value, if the return type is a | ||||
3852 | /// retainable type, then returns need to immediately retain the | ||||
3853 | /// object. If an autorelease is required, it will be done at the | ||||
3854 | /// last instant. | ||||
3855 | } else if (Entity.getKind() == InitializedEntity::EK_Result || | ||||
3856 | Entity.getKind() == InitializedEntity::EK_StmtExprResult) { | ||||
3857 | if (!Entity.getType()->isObjCRetainableType()) | ||||
3858 | return; | ||||
3859 | |||||
3860 | Sequence.AddProduceObjCObjectStep(Entity.getType()); | ||||
3861 | } | ||||
3862 | } | ||||
3863 | |||||
3864 | static void TryListInitialization(Sema &S, | ||||
3865 | const InitializedEntity &Entity, | ||||
3866 | const InitializationKind &Kind, | ||||
3867 | InitListExpr *InitList, | ||||
3868 | InitializationSequence &Sequence, | ||||
3869 | bool TreatUnavailableAsInvalid); | ||||
3870 | |||||
3871 | /// When initializing from init list via constructor, handle | ||||
3872 | /// initialization of an object of type std::initializer_list<T>. | ||||
3873 | /// | ||||
3874 | /// \return true if we have handled initialization of an object of type | ||||
3875 | /// std::initializer_list<T>, false otherwise. | ||||
3876 | static bool TryInitializerListConstruction(Sema &S, | ||||
3877 | InitListExpr *List, | ||||
3878 | QualType DestType, | ||||
3879 | InitializationSequence &Sequence, | ||||
3880 | bool TreatUnavailableAsInvalid) { | ||||
3881 | QualType E; | ||||
3882 | if (!S.isStdInitializerList(DestType, &E)) | ||||
3883 | return false; | ||||
3884 | |||||
3885 | if (!S.isCompleteType(List->getExprLoc(), E)) { | ||||
3886 | Sequence.setIncompleteTypeFailure(E); | ||||
3887 | return true; | ||||
3888 | } | ||||
3889 | |||||
3890 | // Try initializing a temporary array from the init list. | ||||
3891 | QualType ArrayType = S.Context.getConstantArrayType( | ||||
3892 | E.withConst(), | ||||
3893 | llvm::APInt(S.Context.getTypeSize(S.Context.getSizeType()), | ||||
3894 | List->getNumInits()), | ||||
3895 | nullptr, clang::ArrayType::Normal, 0); | ||||
3896 | InitializedEntity HiddenArray = | ||||
3897 | InitializedEntity::InitializeTemporary(ArrayType); | ||||
3898 | InitializationKind Kind = InitializationKind::CreateDirectList( | ||||
3899 | List->getExprLoc(), List->getBeginLoc(), List->getEndLoc()); | ||||
3900 | TryListInitialization(S, HiddenArray, Kind, List, Sequence, | ||||
3901 | TreatUnavailableAsInvalid); | ||||
3902 | if (Sequence) | ||||
3903 | Sequence.AddStdInitializerListConstructionStep(DestType); | ||||
3904 | return true; | ||||
3905 | } | ||||
3906 | |||||
3907 | /// Determine if the constructor has the signature of a copy or move | ||||
3908 | /// constructor for the type T of the class in which it was found. That is, | ||||
3909 | /// determine if its first parameter is of type T or reference to (possibly | ||||
3910 | /// cv-qualified) T. | ||||
3911 | static bool hasCopyOrMoveCtorParam(ASTContext &Ctx, | ||||
3912 | const ConstructorInfo &Info) { | ||||
3913 | if (Info.Constructor->getNumParams() == 0) | ||||
3914 | return false; | ||||
3915 | |||||
3916 | QualType ParmT = | ||||
3917 | Info.Constructor->getParamDecl(0)->getType().getNonReferenceType(); | ||||
3918 | QualType ClassT = | ||||
3919 | Ctx.getRecordType(cast<CXXRecordDecl>(Info.FoundDecl->getDeclContext())); | ||||
3920 | |||||
3921 | return Ctx.hasSameUnqualifiedType(ParmT, ClassT); | ||||
3922 | } | ||||
3923 | |||||
3924 | static OverloadingResult | ||||
3925 | ResolveConstructorOverload(Sema &S, SourceLocation DeclLoc, | ||||
3926 | MultiExprArg Args, | ||||
3927 | OverloadCandidateSet &CandidateSet, | ||||
3928 | QualType DestType, | ||||
3929 | DeclContext::lookup_result Ctors, | ||||
3930 | OverloadCandidateSet::iterator &Best, | ||||
3931 | bool CopyInitializing, bool AllowExplicit, | ||||
3932 | bool OnlyListConstructors, bool IsListInit, | ||||
3933 | bool SecondStepOfCopyInit = false) { | ||||
3934 | CandidateSet.clear(OverloadCandidateSet::CSK_InitByConstructor); | ||||
3935 | CandidateSet.setDestAS(DestType.getQualifiers().getAddressSpace()); | ||||
3936 | |||||
3937 | for (NamedDecl *D : Ctors) { | ||||
3938 | auto Info = getConstructorInfo(D); | ||||
3939 | if (!Info.Constructor || Info.Constructor->isInvalidDecl()) | ||||
3940 | continue; | ||||
3941 | |||||
3942 | if (OnlyListConstructors && !S.isInitListConstructor(Info.Constructor)) | ||||
3943 | continue; | ||||
3944 | |||||
3945 | // C++11 [over.best.ics]p4: | ||||
3946 | // ... and the constructor or user-defined conversion function is a | ||||
3947 | // candidate by | ||||
3948 | // - 13.3.1.3, when the argument is the temporary in the second step | ||||
3949 | // of a class copy-initialization, or | ||||
3950 | // - 13.3.1.4, 13.3.1.5, or 13.3.1.6 (in all cases), [not handled here] | ||||
3951 | // - the second phase of 13.3.1.7 when the initializer list has exactly | ||||
3952 | // one element that is itself an initializer list, and the target is | ||||
3953 | // the first parameter of a constructor of class X, and the conversion | ||||
3954 | // is to X or reference to (possibly cv-qualified X), | ||||
3955 | // user-defined conversion sequences are not considered. | ||||
3956 | bool SuppressUserConversions = | ||||
3957 | SecondStepOfCopyInit || | ||||
3958 | (IsListInit && Args.size() == 1 && isa<InitListExpr>(Args[0]) && | ||||
3959 | hasCopyOrMoveCtorParam(S.Context, Info)); | ||||
3960 | |||||
3961 | if (Info.ConstructorTmpl) | ||||
3962 | S.AddTemplateOverloadCandidate( | ||||
3963 | Info.ConstructorTmpl, Info.FoundDecl, | ||||
3964 | /*ExplicitArgs*/ nullptr, Args, CandidateSet, SuppressUserConversions, | ||||
3965 | /*PartialOverloading=*/false, AllowExplicit); | ||||
3966 | else { | ||||
3967 | // C++ [over.match.copy]p1: | ||||
3968 | // - When initializing a temporary to be bound to the first parameter | ||||
3969 | // of a constructor [for type T] that takes a reference to possibly | ||||
3970 | // cv-qualified T as its first argument, called with a single | ||||
3971 | // argument in the context of direct-initialization, explicit | ||||
3972 | // conversion functions are also considered. | ||||
3973 | // FIXME: What if a constructor template instantiates to such a signature? | ||||
3974 | bool AllowExplicitConv = AllowExplicit && !CopyInitializing && | ||||
3975 | Args.size() == 1 && | ||||
3976 | hasCopyOrMoveCtorParam(S.Context, Info); | ||||
3977 | S.AddOverloadCandidate(Info.Constructor, Info.FoundDecl, Args, | ||||
3978 | CandidateSet, SuppressUserConversions, | ||||
3979 | /*PartialOverloading=*/false, AllowExplicit, | ||||
3980 | AllowExplicitConv); | ||||
3981 | } | ||||
3982 | } | ||||
3983 | |||||
3984 | // FIXME: Work around a bug in C++17 guaranteed copy elision. | ||||
3985 | // | ||||
3986 | // When initializing an object of class type T by constructor | ||||
3987 | // ([over.match.ctor]) or by list-initialization ([over.match.list]) | ||||
3988 | // from a single expression of class type U, conversion functions of | ||||
3989 | // U that convert to the non-reference type cv T are candidates. | ||||
3990 | // Explicit conversion functions are only candidates during | ||||
3991 | // direct-initialization. | ||||
3992 | // | ||||
3993 | // Note: SecondStepOfCopyInit is only ever true in this case when | ||||
3994 | // evaluating whether to produce a C++98 compatibility warning. | ||||
3995 | if (S.getLangOpts().CPlusPlus17 && Args.size() == 1 && | ||||
3996 | !SecondStepOfCopyInit) { | ||||
3997 | Expr *Initializer = Args[0]; | ||||
3998 | auto *SourceRD = Initializer->getType()->getAsCXXRecordDecl(); | ||||
3999 | if (SourceRD && S.isCompleteType(DeclLoc, Initializer->getType())) { | ||||
4000 | const auto &Conversions = SourceRD->getVisibleConversionFunctions(); | ||||
4001 | for (auto I = Conversions.begin(), E = Conversions.end(); I != E; ++I) { | ||||
4002 | NamedDecl *D = *I; | ||||
4003 | CXXRecordDecl *ActingDC = cast<CXXRecordDecl>(D->getDeclContext()); | ||||
4004 | D = D->getUnderlyingDecl(); | ||||
4005 | |||||
4006 | FunctionTemplateDecl *ConvTemplate = dyn_cast<FunctionTemplateDecl>(D); | ||||
4007 | CXXConversionDecl *Conv; | ||||
4008 | if (ConvTemplate) | ||||
4009 | Conv = cast<CXXConversionDecl>(ConvTemplate->getTemplatedDecl()); | ||||
4010 | else | ||||
4011 | Conv = cast<CXXConversionDecl>(D); | ||||
4012 | |||||
4013 | if (ConvTemplate) | ||||
4014 | S.AddTemplateConversionCandidate( | ||||
4015 | ConvTemplate, I.getPair(), ActingDC, Initializer, DestType, | ||||
4016 | CandidateSet, AllowExplicit, AllowExplicit, | ||||
4017 | /*AllowResultConversion*/ false); | ||||
4018 | else | ||||
4019 | S.AddConversionCandidate(Conv, I.getPair(), ActingDC, Initializer, | ||||
4020 | DestType, CandidateSet, AllowExplicit, | ||||
4021 | AllowExplicit, | ||||
4022 | /*AllowResultConversion*/ false); | ||||
4023 | } | ||||
4024 | } | ||||
4025 | } | ||||
4026 | |||||
4027 | // Perform overload resolution and return the result. | ||||
4028 | return CandidateSet.BestViableFunction(S, DeclLoc, Best); | ||||
4029 | } | ||||
4030 | |||||
4031 | /// Attempt initialization by constructor (C++ [dcl.init]), which | ||||
4032 | /// enumerates the constructors of the initialized entity and performs overload | ||||
4033 | /// resolution to select the best. | ||||
4034 | /// \param DestType The destination class type. | ||||
4035 | /// \param DestArrayType The destination type, which is either DestType or | ||||
4036 | /// a (possibly multidimensional) array of DestType. | ||||
4037 | /// \param IsListInit Is this list-initialization? | ||||
4038 | /// \param IsInitListCopy Is this non-list-initialization resulting from a | ||||
4039 | /// list-initialization from {x} where x is the same | ||||
4040 | /// type as the entity? | ||||
4041 | static void TryConstructorInitialization(Sema &S, | ||||
4042 | const InitializedEntity &Entity, | ||||
4043 | const InitializationKind &Kind, | ||||
4044 | MultiExprArg Args, QualType DestType, | ||||
4045 | QualType DestArrayType, | ||||
4046 | InitializationSequence &Sequence, | ||||
4047 | bool IsListInit = false, | ||||
4048 | bool IsInitListCopy = false) { | ||||
4049 | assert(((!IsListInit && !IsInitListCopy) ||(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)) | ||||
4050 | (Args.size() == 1 && isa<InitListExpr>(Args[0]))) &&(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)) | ||||
4051 | "IsListInit/IsInitListCopy must come with a single initializer list "(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)) | ||||
4052 | "argument.")(static_cast <bool> (((!IsListInit && !IsInitListCopy ) || (Args.size() == 1 && isa<InitListExpr>(Args [0]))) && "IsListInit/IsInitListCopy must come with a single initializer list " "argument.") ? void (0) : __assert_fail ("((!IsListInit && !IsInitListCopy) || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) && \"IsListInit/IsInitListCopy must come with a single initializer list \" \"argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4052, __extension__ __PRETTY_FUNCTION__)); | ||||
4053 | InitListExpr *ILE = | ||||
4054 | (IsListInit || IsInitListCopy) ? cast<InitListExpr>(Args[0]) : nullptr; | ||||
4055 | MultiExprArg UnwrappedArgs = | ||||
4056 | ILE ? MultiExprArg(ILE->getInits(), ILE->getNumInits()) : Args; | ||||
4057 | |||||
4058 | // The type we're constructing needs to be complete. | ||||
4059 | if (!S.isCompleteType(Kind.getLocation(), DestType)) { | ||||
4060 | Sequence.setIncompleteTypeFailure(DestType); | ||||
4061 | return; | ||||
4062 | } | ||||
4063 | |||||
4064 | // C++17 [dcl.init]p17: | ||||
4065 | // - If the initializer expression is a prvalue and the cv-unqualified | ||||
4066 | // version of the source type is the same class as the class of the | ||||
4067 | // destination, the initializer expression is used to initialize the | ||||
4068 | // destination object. | ||||
4069 | // Per DR (no number yet), this does not apply when initializing a base | ||||
4070 | // class or delegating to another constructor from a mem-initializer. | ||||
4071 | // ObjC++: Lambda captured by the block in the lambda to block conversion | ||||
4072 | // should avoid copy elision. | ||||
4073 | if (S.getLangOpts().CPlusPlus17 && | ||||
4074 | Entity.getKind() != InitializedEntity::EK_Base && | ||||
4075 | Entity.getKind() != InitializedEntity::EK_Delegating && | ||||
4076 | Entity.getKind() != | ||||
4077 | InitializedEntity::EK_LambdaToBlockConversionBlockElement && | ||||
4078 | UnwrappedArgs.size() == 1 && UnwrappedArgs[0]->isPRValue() && | ||||
4079 | S.Context.hasSameUnqualifiedType(UnwrappedArgs[0]->getType(), DestType)) { | ||||
4080 | // Convert qualifications if necessary. | ||||
4081 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||
4082 | if (ILE) | ||||
4083 | Sequence.RewrapReferenceInitList(DestType, ILE); | ||||
4084 | return; | ||||
4085 | } | ||||
4086 | |||||
4087 | const RecordType *DestRecordType = DestType->getAs<RecordType>(); | ||||
4088 | assert(DestRecordType && "Constructor initialization requires record type")(static_cast <bool> (DestRecordType && "Constructor initialization requires record type" ) ? void (0) : __assert_fail ("DestRecordType && \"Constructor initialization requires record type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4088, __extension__ __PRETTY_FUNCTION__)); | ||||
4089 | CXXRecordDecl *DestRecordDecl | ||||
4090 | = cast<CXXRecordDecl>(DestRecordType->getDecl()); | ||||
4091 | |||||
4092 | // Build the candidate set directly in the initialization sequence | ||||
4093 | // structure, so that it will persist if we fail. | ||||
4094 | OverloadCandidateSet &CandidateSet = Sequence.getFailedCandidateSet(); | ||||
4095 | |||||
4096 | // Determine whether we are allowed to call explicit constructors or | ||||
4097 | // explicit conversion operators. | ||||
4098 | bool AllowExplicit = Kind.AllowExplicit() || IsListInit; | ||||
4099 | bool CopyInitialization = Kind.getKind() == InitializationKind::IK_Copy; | ||||
4100 | |||||
4101 | // - Otherwise, if T is a class type, constructors are considered. The | ||||
4102 | // applicable constructors are enumerated, and the best one is chosen | ||||
4103 | // through overload resolution. | ||||
4104 | DeclContext::lookup_result Ctors = S.LookupConstructors(DestRecordDecl); | ||||
4105 | |||||
4106 | OverloadingResult Result = OR_No_Viable_Function; | ||||
4107 | OverloadCandidateSet::iterator Best; | ||||
4108 | bool AsInitializerList = false; | ||||
4109 | |||||
4110 | // C++11 [over.match.list]p1, per DR1467: | ||||
4111 | // When objects of non-aggregate type T are list-initialized, such that | ||||
4112 | // 8.5.4 [dcl.init.list] specifies that overload resolution is performed | ||||
4113 | // according to the rules in this section, overload resolution selects | ||||
4114 | // the constructor in two phases: | ||||
4115 | // | ||||
4116 | // - Initially, the candidate functions are the initializer-list | ||||
4117 | // constructors of the class T and the argument list consists of the | ||||
4118 | // initializer list as a single argument. | ||||
4119 | if (IsListInit) { | ||||
4120 | AsInitializerList = true; | ||||
4121 | |||||
4122 | // If the initializer list has no elements and T has a default constructor, | ||||
4123 | // the first phase is omitted. | ||||
4124 | if (!(UnwrappedArgs.empty() && S.LookupDefaultConstructor(DestRecordDecl))) | ||||
4125 | Result = ResolveConstructorOverload(S, Kind.getLocation(), Args, | ||||
4126 | CandidateSet, DestType, Ctors, Best, | ||||
4127 | CopyInitialization, AllowExplicit, | ||||
4128 | /*OnlyListConstructors=*/true, | ||||
4129 | IsListInit); | ||||
4130 | } | ||||
4131 | |||||
4132 | // C++11 [over.match.list]p1: | ||||
4133 | // - If no viable initializer-list constructor is found, overload resolution | ||||
4134 | // is performed again, where the candidate functions are all the | ||||
4135 | // constructors of the class T and the argument list consists of the | ||||
4136 | // elements of the initializer list. | ||||
4137 | if (Result == OR_No_Viable_Function) { | ||||
4138 | AsInitializerList = false; | ||||
4139 | Result = ResolveConstructorOverload(S, Kind.getLocation(), UnwrappedArgs, | ||||
4140 | CandidateSet, DestType, Ctors, Best, | ||||
4141 | CopyInitialization, AllowExplicit, | ||||
4142 | /*OnlyListConstructors=*/false, | ||||
4143 | IsListInit); | ||||
4144 | } | ||||
4145 | if (Result) { | ||||
4146 | Sequence.SetOverloadFailure( | ||||
4147 | IsListInit ? InitializationSequence::FK_ListConstructorOverloadFailed | ||||
4148 | : InitializationSequence::FK_ConstructorOverloadFailed, | ||||
4149 | Result); | ||||
4150 | |||||
4151 | if (Result != OR_Deleted) | ||||
4152 | return; | ||||
4153 | } | ||||
4154 | |||||
4155 | bool HadMultipleCandidates = (CandidateSet.size() > 1); | ||||
4156 | |||||
4157 | // In C++17, ResolveConstructorOverload can select a conversion function | ||||
4158 | // instead of a constructor. | ||||
4159 | if (auto *CD = dyn_cast<CXXConversionDecl>(Best->Function)) { | ||||
4160 | // Add the user-defined conversion step that calls the conversion function. | ||||
4161 | QualType ConvType = CD->getConversionType(); | ||||
4162 | assert(S.Context.hasSameUnqualifiedType(ConvType, DestType) &&(static_cast <bool> (S.Context.hasSameUnqualifiedType(ConvType , DestType) && "should not have selected this conversion function" ) ? void (0) : __assert_fail ("S.Context.hasSameUnqualifiedType(ConvType, DestType) && \"should not have selected this conversion function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4163, __extension__ __PRETTY_FUNCTION__)) | ||||
4163 | "should not have selected this conversion function")(static_cast <bool> (S.Context.hasSameUnqualifiedType(ConvType , DestType) && "should not have selected this conversion function" ) ? void (0) : __assert_fail ("S.Context.hasSameUnqualifiedType(ConvType, DestType) && \"should not have selected this conversion function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4163, __extension__ __PRETTY_FUNCTION__)); | ||||
4164 | Sequence.AddUserConversionStep(CD, Best->FoundDecl, ConvType, | ||||
4165 | HadMultipleCandidates); | ||||
4166 | if (!S.Context.hasSameType(ConvType, DestType)) | ||||
4167 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||
4168 | if (IsListInit) | ||||
4169 | Sequence.RewrapReferenceInitList(Entity.getType(), ILE); | ||||
4170 | return; | ||||
4171 | } | ||||
4172 | |||||
4173 | CXXConstructorDecl *CtorDecl = cast<CXXConstructorDecl>(Best->Function); | ||||
4174 | if (Result != OR_Deleted) { | ||||
4175 | // C++11 [dcl.init]p6: | ||||
4176 | // If a program calls for the default initialization of an object | ||||
4177 | // of a const-qualified type T, T shall be a class type with a | ||||
4178 | // user-provided default constructor. | ||||
4179 | // C++ core issue 253 proposal: | ||||
4180 | // If the implicit default constructor initializes all subobjects, no | ||||
4181 | // initializer should be required. | ||||
4182 | // The 253 proposal is for example needed to process libstdc++ headers | ||||
4183 | // in 5.x. | ||||
4184 | if (Kind.getKind() == InitializationKind::IK_Default && | ||||
4185 | Entity.getType().isConstQualified()) { | ||||
4186 | if (!CtorDecl->getParent()->allowConstDefaultInit()) { | ||||
4187 | if (!maybeRecoverWithZeroInitialization(S, Sequence, Entity)) | ||||
4188 | Sequence.SetFailed(InitializationSequence::FK_DefaultInitOfConst); | ||||
4189 | return; | ||||
4190 | } | ||||
4191 | } | ||||
4192 | |||||
4193 | // C++11 [over.match.list]p1: | ||||
4194 | // In copy-list-initialization, if an explicit constructor is chosen, the | ||||
4195 | // initializer is ill-formed. | ||||
4196 | if (IsListInit && !Kind.AllowExplicit() && CtorDecl->isExplicit()) { | ||||
4197 | Sequence.SetFailed(InitializationSequence::FK_ExplicitConstructor); | ||||
4198 | return; | ||||
4199 | } | ||||
4200 | } | ||||
4201 | |||||
4202 | // [class.copy.elision]p3: | ||||
4203 | // In some copy-initialization contexts, a two-stage overload resolution | ||||
4204 | // is performed. | ||||
4205 | // If the first overload resolution selects a deleted function, we also | ||||
4206 | // need the initialization sequence to decide whether to perform the second | ||||
4207 | // overload resolution. | ||||
4208 | // For deleted functions in other contexts, there is no need to get the | ||||
4209 | // initialization sequence. | ||||
4210 | if (Result == OR_Deleted && Kind.getKind() != InitializationKind::IK_Copy) | ||||
4211 | return; | ||||
4212 | |||||
4213 | // Add the constructor initialization step. Any cv-qualification conversion is | ||||
4214 | // subsumed by the initialization. | ||||
4215 | Sequence.AddConstructorInitializationStep( | ||||
4216 | Best->FoundDecl, CtorDecl, DestArrayType, HadMultipleCandidates, | ||||
4217 | IsListInit | IsInitListCopy, AsInitializerList); | ||||
4218 | } | ||||
4219 | |||||
4220 | static bool | ||||
4221 | ResolveOverloadedFunctionForReferenceBinding(Sema &S, | ||||
4222 | Expr *Initializer, | ||||
4223 | QualType &SourceType, | ||||
4224 | QualType &UnqualifiedSourceType, | ||||
4225 | QualType UnqualifiedTargetType, | ||||
4226 | InitializationSequence &Sequence) { | ||||
4227 | if (S.Context.getCanonicalType(UnqualifiedSourceType) == | ||||
4228 | S.Context.OverloadTy) { | ||||
4229 | DeclAccessPair Found; | ||||
4230 | bool HadMultipleCandidates = false; | ||||
4231 | if (FunctionDecl *Fn | ||||
4232 | = S.ResolveAddressOfOverloadedFunction(Initializer, | ||||
4233 | UnqualifiedTargetType, | ||||
4234 | false, Found, | ||||
4235 | &HadMultipleCandidates)) { | ||||
4236 | Sequence.AddAddressOverloadResolutionStep(Fn, Found, | ||||
4237 | HadMultipleCandidates); | ||||
4238 | SourceType = Fn->getType(); | ||||
4239 | UnqualifiedSourceType = SourceType.getUnqualifiedType(); | ||||
4240 | } else if (!UnqualifiedTargetType->isRecordType()) { | ||||
4241 | Sequence.SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||
4242 | return true; | ||||
4243 | } | ||||
4244 | } | ||||
4245 | return false; | ||||
4246 | } | ||||
4247 | |||||
4248 | static void TryReferenceInitializationCore(Sema &S, | ||||
4249 | const InitializedEntity &Entity, | ||||
4250 | const InitializationKind &Kind, | ||||
4251 | Expr *Initializer, | ||||
4252 | QualType cv1T1, QualType T1, | ||||
4253 | Qualifiers T1Quals, | ||||
4254 | QualType cv2T2, QualType T2, | ||||
4255 | Qualifiers T2Quals, | ||||
4256 | InitializationSequence &Sequence); | ||||
4257 | |||||
4258 | static void TryValueInitialization(Sema &S, | ||||
4259 | const InitializedEntity &Entity, | ||||
4260 | const InitializationKind &Kind, | ||||
4261 | InitializationSequence &Sequence, | ||||
4262 | InitListExpr *InitList = nullptr); | ||||
4263 | |||||
4264 | /// Attempt list initialization of a reference. | ||||
4265 | static void TryReferenceListInitialization(Sema &S, | ||||
4266 | const InitializedEntity &Entity, | ||||
4267 | const InitializationKind &Kind, | ||||
4268 | InitListExpr *InitList, | ||||
4269 | InitializationSequence &Sequence, | ||||
4270 | bool TreatUnavailableAsInvalid) { | ||||
4271 | // First, catch C++03 where this isn't possible. | ||||
4272 | if (!S.getLangOpts().CPlusPlus11) { | ||||
4273 | Sequence.SetFailed(InitializationSequence::FK_ReferenceBindingToInitList); | ||||
4274 | return; | ||||
4275 | } | ||||
4276 | // Can't reference initialize a compound literal. | ||||
4277 | if (Entity.getKind() == InitializedEntity::EK_CompoundLiteralInit) { | ||||
4278 | Sequence.SetFailed(InitializationSequence::FK_ReferenceBindingToInitList); | ||||
4279 | return; | ||||
4280 | } | ||||
4281 | |||||
4282 | QualType DestType = Entity.getType(); | ||||
4283 | QualType cv1T1 = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||
4284 | Qualifiers T1Quals; | ||||
4285 | QualType T1 = S.Context.getUnqualifiedArrayType(cv1T1, T1Quals); | ||||
4286 | |||||
4287 | // Reference initialization via an initializer list works thus: | ||||
4288 | // If the initializer list consists of a single element that is | ||||
4289 | // reference-related to the referenced type, bind directly to that element | ||||
4290 | // (possibly creating temporaries). | ||||
4291 | // Otherwise, initialize a temporary with the initializer list and | ||||
4292 | // bind to that. | ||||
4293 | if (InitList->getNumInits() == 1) { | ||||
4294 | Expr *Initializer = InitList->getInit(0); | ||||
4295 | QualType cv2T2 = S.getCompletedType(Initializer); | ||||
4296 | Qualifiers T2Quals; | ||||
4297 | QualType T2 = S.Context.getUnqualifiedArrayType(cv2T2, T2Quals); | ||||
4298 | |||||
4299 | // If this fails, creating a temporary wouldn't work either. | ||||
4300 | if (ResolveOverloadedFunctionForReferenceBinding(S, Initializer, cv2T2, T2, | ||||
4301 | T1, Sequence)) | ||||
4302 | return; | ||||
4303 | |||||
4304 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||
4305 | Sema::ReferenceCompareResult RefRelationship | ||||
4306 | = S.CompareReferenceRelationship(DeclLoc, cv1T1, cv2T2); | ||||
4307 | if (RefRelationship >= Sema::Ref_Related) { | ||||
4308 | // Try to bind the reference here. | ||||
4309 | TryReferenceInitializationCore(S, Entity, Kind, Initializer, cv1T1, T1, | ||||
4310 | T1Quals, cv2T2, T2, T2Quals, Sequence); | ||||
4311 | if (Sequence) | ||||
4312 | Sequence.RewrapReferenceInitList(cv1T1, InitList); | ||||
4313 | return; | ||||
4314 | } | ||||
4315 | |||||
4316 | // Update the initializer if we've resolved an overloaded function. | ||||
4317 | if (Sequence.step_begin() != Sequence.step_end()) | ||||
4318 | Sequence.RewrapReferenceInitList(cv1T1, InitList); | ||||
4319 | } | ||||
4320 | // Perform address space compatibility check. | ||||
4321 | QualType cv1T1IgnoreAS = cv1T1; | ||||
4322 | if (T1Quals.hasAddressSpace()) { | ||||
4323 | Qualifiers T2Quals; | ||||
4324 | (void)S.Context.getUnqualifiedArrayType(InitList->getType(), T2Quals); | ||||
4325 | if (!T1Quals.isAddressSpaceSupersetOf(T2Quals)) { | ||||
4326 | Sequence.SetFailed( | ||||
4327 | InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||
4328 | return; | ||||
4329 | } | ||||
4330 | // Ignore address space of reference type at this point and perform address | ||||
4331 | // space conversion after the reference binding step. | ||||
4332 | cv1T1IgnoreAS = | ||||
4333 | S.Context.getQualifiedType(T1, T1Quals.withoutAddressSpace()); | ||||
4334 | } | ||||
4335 | // Not reference-related. Create a temporary and bind to that. | ||||
4336 | InitializedEntity TempEntity = | ||||
4337 | InitializedEntity::InitializeTemporary(cv1T1IgnoreAS); | ||||
4338 | |||||
4339 | TryListInitialization(S, TempEntity, Kind, InitList, Sequence, | ||||
4340 | TreatUnavailableAsInvalid); | ||||
4341 | if (Sequence) { | ||||
4342 | if (DestType->isRValueReferenceType() || | ||||
4343 | (T1Quals.hasConst() && !T1Quals.hasVolatile())) { | ||||
4344 | Sequence.AddReferenceBindingStep(cv1T1IgnoreAS, | ||||
4345 | /*BindingTemporary=*/true); | ||||
4346 | if (T1Quals.hasAddressSpace()) | ||||
4347 | Sequence.AddQualificationConversionStep( | ||||
4348 | cv1T1, DestType->isRValueReferenceType() ? VK_XValue : VK_LValue); | ||||
4349 | } else | ||||
4350 | Sequence.SetFailed( | ||||
4351 | InitializationSequence::FK_NonConstLValueReferenceBindingToTemporary); | ||||
4352 | } | ||||
4353 | } | ||||
4354 | |||||
4355 | /// Attempt list initialization (C++0x [dcl.init.list]) | ||||
4356 | static void TryListInitialization(Sema &S, | ||||
4357 | const InitializedEntity &Entity, | ||||
4358 | const InitializationKind &Kind, | ||||
4359 | InitListExpr *InitList, | ||||
4360 | InitializationSequence &Sequence, | ||||
4361 | bool TreatUnavailableAsInvalid) { | ||||
4362 | QualType DestType = Entity.getType(); | ||||
4363 | |||||
4364 | // C++ doesn't allow scalar initialization with more than one argument. | ||||
4365 | // But C99 complex numbers are scalars and it makes sense there. | ||||
4366 | if (S.getLangOpts().CPlusPlus && DestType->isScalarType() && | ||||
4367 | !DestType->isAnyComplexType() && InitList->getNumInits() > 1) { | ||||
4368 | Sequence.SetFailed(InitializationSequence::FK_TooManyInitsForScalar); | ||||
4369 | return; | ||||
4370 | } | ||||
4371 | if (DestType->isReferenceType()) { | ||||
4372 | TryReferenceListInitialization(S, Entity, Kind, InitList, Sequence, | ||||
4373 | TreatUnavailableAsInvalid); | ||||
4374 | return; | ||||
4375 | } | ||||
4376 | |||||
4377 | if (DestType->isRecordType() && | ||||
4378 | !S.isCompleteType(InitList->getBeginLoc(), DestType)) { | ||||
4379 | Sequence.setIncompleteTypeFailure(DestType); | ||||
4380 | return; | ||||
4381 | } | ||||
4382 | |||||
4383 | // C++11 [dcl.init.list]p3, per DR1467: | ||||
4384 | // - If T is a class type and the initializer list has a single element of | ||||
4385 | // type cv U, where U is T or a class derived from T, the object is | ||||
4386 | // initialized from that element (by copy-initialization for | ||||
4387 | // copy-list-initialization, or by direct-initialization for | ||||
4388 | // direct-list-initialization). | ||||
4389 | // - Otherwise, if T is a character array and the initializer list has a | ||||
4390 | // single element that is an appropriately-typed string literal | ||||
4391 | // (8.5.2 [dcl.init.string]), initialization is performed as described | ||||
4392 | // in that section. | ||||
4393 | // - Otherwise, if T is an aggregate, [...] (continue below). | ||||
4394 | if (S.getLangOpts().CPlusPlus11 && InitList->getNumInits() == 1) { | ||||
4395 | if (DestType->isRecordType()) { | ||||
4396 | QualType InitType = InitList->getInit(0)->getType(); | ||||
4397 | if (S.Context.hasSameUnqualifiedType(InitType, DestType) || | ||||
4398 | S.IsDerivedFrom(InitList->getBeginLoc(), InitType, DestType)) { | ||||
4399 | Expr *InitListAsExpr = InitList; | ||||
4400 | TryConstructorInitialization(S, Entity, Kind, InitListAsExpr, DestType, | ||||
4401 | DestType, Sequence, | ||||
4402 | /*InitListSyntax*/false, | ||||
4403 | /*IsInitListCopy*/true); | ||||
4404 | return; | ||||
4405 | } | ||||
4406 | } | ||||
4407 | if (const ArrayType *DestAT = S.Context.getAsArrayType(DestType)) { | ||||
4408 | Expr *SubInit[1] = {InitList->getInit(0)}; | ||||
4409 | if (!isa<VariableArrayType>(DestAT) && | ||||
4410 | IsStringInit(SubInit[0], DestAT, S.Context) == SIF_None) { | ||||
4411 | InitializationKind SubKind = | ||||
4412 | Kind.getKind() == InitializationKind::IK_DirectList | ||||
4413 | ? InitializationKind::CreateDirect(Kind.getLocation(), | ||||
4414 | InitList->getLBraceLoc(), | ||||
4415 | InitList->getRBraceLoc()) | ||||
4416 | : Kind; | ||||
4417 | Sequence.InitializeFrom(S, Entity, SubKind, SubInit, | ||||
4418 | /*TopLevelOfInitList*/ true, | ||||
4419 | TreatUnavailableAsInvalid); | ||||
4420 | |||||
4421 | // TryStringLiteralInitialization() (in InitializeFrom()) will fail if | ||||
4422 | // the element is not an appropriately-typed string literal, in which | ||||
4423 | // case we should proceed as in C++11 (below). | ||||
4424 | if (Sequence) { | ||||
4425 | Sequence.RewrapReferenceInitList(Entity.getType(), InitList); | ||||
4426 | return; | ||||
4427 | } | ||||
4428 | } | ||||
4429 | } | ||||
4430 | } | ||||
4431 | |||||
4432 | // C++11 [dcl.init.list]p3: | ||||
4433 | // - If T is an aggregate, aggregate initialization is performed. | ||||
4434 | if ((DestType->isRecordType() && !DestType->isAggregateType()) || | ||||
4435 | (S.getLangOpts().CPlusPlus11 && | ||||
4436 | S.isStdInitializerList(DestType, nullptr))) { | ||||
4437 | if (S.getLangOpts().CPlusPlus11) { | ||||
4438 | // - Otherwise, if the initializer list has no elements and T is a | ||||
4439 | // class type with a default constructor, the object is | ||||
4440 | // value-initialized. | ||||
4441 | if (InitList->getNumInits() == 0) { | ||||
4442 | CXXRecordDecl *RD = DestType->getAsCXXRecordDecl(); | ||||
4443 | if (S.LookupDefaultConstructor(RD)) { | ||||
4444 | TryValueInitialization(S, Entity, Kind, Sequence, InitList); | ||||
4445 | return; | ||||
4446 | } | ||||
4447 | } | ||||
4448 | |||||
4449 | // - Otherwise, if T is a specialization of std::initializer_list<E>, | ||||
4450 | // an initializer_list object constructed [...] | ||||
4451 | if (TryInitializerListConstruction(S, InitList, DestType, Sequence, | ||||
4452 | TreatUnavailableAsInvalid)) | ||||
4453 | return; | ||||
4454 | |||||
4455 | // - Otherwise, if T is a class type, constructors are considered. | ||||
4456 | Expr *InitListAsExpr = InitList; | ||||
4457 | TryConstructorInitialization(S, Entity, Kind, InitListAsExpr, DestType, | ||||
4458 | DestType, Sequence, /*InitListSyntax*/true); | ||||
4459 | } else | ||||
4460 | Sequence.SetFailed(InitializationSequence::FK_InitListBadDestinationType); | ||||
4461 | return; | ||||
4462 | } | ||||
4463 | |||||
4464 | if (S.getLangOpts().CPlusPlus && !DestType->isAggregateType() && | ||||
4465 | InitList->getNumInits() == 1) { | ||||
4466 | Expr *E = InitList->getInit(0); | ||||
4467 | |||||
4468 | // - Otherwise, if T is an enumeration with a fixed underlying type, | ||||
4469 | // the initializer-list has a single element v, and the initialization | ||||
4470 | // is direct-list-initialization, the object is initialized with the | ||||
4471 | // value T(v); if a narrowing conversion is required to convert v to | ||||
4472 | // the underlying type of T, the program is ill-formed. | ||||
4473 | auto *ET = DestType->getAs<EnumType>(); | ||||
4474 | if (S.getLangOpts().CPlusPlus17 && | ||||
4475 | Kind.getKind() == InitializationKind::IK_DirectList && | ||||
4476 | ET && ET->getDecl()->isFixed() && | ||||
4477 | !S.Context.hasSameUnqualifiedType(E->getType(), DestType) && | ||||
4478 | (E->getType()->isIntegralOrEnumerationType() || | ||||
4479 | E->getType()->isFloatingType())) { | ||||
4480 | // There are two ways that T(v) can work when T is an enumeration type. | ||||
4481 | // If there is either an implicit conversion sequence from v to T or | ||||
4482 | // a conversion function that can convert from v to T, then we use that. | ||||
4483 | // Otherwise, if v is of integral, enumeration, or floating-point type, | ||||
4484 | // it is converted to the enumeration type via its underlying type. | ||||
4485 | // There is no overlap possible between these two cases (except when the | ||||
4486 | // source value is already of the destination type), and the first | ||||
4487 | // case is handled by the general case for single-element lists below. | ||||
4488 | ImplicitConversionSequence ICS; | ||||
4489 | ICS.setStandard(); | ||||
4490 | ICS.Standard.setAsIdentityConversion(); | ||||
4491 | if (!E->isPRValue()) | ||||
4492 | ICS.Standard.First = ICK_Lvalue_To_Rvalue; | ||||
4493 | // If E is of a floating-point type, then the conversion is ill-formed | ||||
4494 | // due to narrowing, but go through the motions in order to produce the | ||||
4495 | // right diagnostic. | ||||
4496 | ICS.Standard.Second = E->getType()->isFloatingType() | ||||
4497 | ? ICK_Floating_Integral | ||||
4498 | : ICK_Integral_Conversion; | ||||
4499 | ICS.Standard.setFromType(E->getType()); | ||||
4500 | ICS.Standard.setToType(0, E->getType()); | ||||
4501 | ICS.Standard.setToType(1, DestType); | ||||
4502 | ICS.Standard.setToType(2, DestType); | ||||
4503 | Sequence.AddConversionSequenceStep(ICS, ICS.Standard.getToType(2), | ||||
4504 | /*TopLevelOfInitList*/true); | ||||
4505 | Sequence.RewrapReferenceInitList(Entity.getType(), InitList); | ||||
4506 | return; | ||||
4507 | } | ||||
4508 | |||||
4509 | // - Otherwise, if the initializer list has a single element of type E | ||||
4510 | // [...references are handled above...], the object or reference is | ||||
4511 | // initialized from that element (by copy-initialization for | ||||
4512 | // copy-list-initialization, or by direct-initialization for | ||||
4513 | // direct-list-initialization); if a narrowing conversion is required | ||||
4514 | // to convert the element to T, the program is ill-formed. | ||||
4515 | // | ||||
4516 | // Per core-24034, this is direct-initialization if we were performing | ||||
4517 | // direct-list-initialization and copy-initialization otherwise. | ||||
4518 | // We can't use InitListChecker for this, because it always performs | ||||
4519 | // copy-initialization. This only matters if we might use an 'explicit' | ||||
4520 | // conversion operator, or for the special case conversion of nullptr_t to | ||||
4521 | // bool, so we only need to handle those cases. | ||||
4522 | // | ||||
4523 | // FIXME: Why not do this in all cases? | ||||
4524 | Expr *Init = InitList->getInit(0); | ||||
4525 | if (Init->getType()->isRecordType() || | ||||
4526 | (Init->getType()->isNullPtrType() && DestType->isBooleanType())) { | ||||
4527 | InitializationKind SubKind = | ||||
4528 | Kind.getKind() == InitializationKind::IK_DirectList | ||||
4529 | ? InitializationKind::CreateDirect(Kind.getLocation(), | ||||
4530 | InitList->getLBraceLoc(), | ||||
4531 | InitList->getRBraceLoc()) | ||||
4532 | : Kind; | ||||
4533 | Expr *SubInit[1] = { Init }; | ||||
4534 | Sequence.InitializeFrom(S, Entity, SubKind, SubInit, | ||||
4535 | /*TopLevelOfInitList*/true, | ||||
4536 | TreatUnavailableAsInvalid); | ||||
4537 | if (Sequence) | ||||
4538 | Sequence.RewrapReferenceInitList(Entity.getType(), InitList); | ||||
4539 | return; | ||||
4540 | } | ||||
4541 | } | ||||
4542 | |||||
4543 | InitListChecker CheckInitList(S, Entity, InitList, | ||||
4544 | DestType, /*VerifyOnly=*/true, TreatUnavailableAsInvalid); | ||||
4545 | if (CheckInitList.HadError()) { | ||||
4546 | Sequence.SetFailed(InitializationSequence::FK_ListInitializationFailed); | ||||
4547 | return; | ||||
4548 | } | ||||
4549 | |||||
4550 | // Add the list initialization step with the built init list. | ||||
4551 | Sequence.AddListInitializationStep(DestType); | ||||
4552 | } | ||||
4553 | |||||
4554 | /// Try a reference initialization that involves calling a conversion | ||||
4555 | /// function. | ||||
4556 | static OverloadingResult TryRefInitWithConversionFunction( | ||||
4557 | Sema &S, const InitializedEntity &Entity, const InitializationKind &Kind, | ||||
4558 | Expr *Initializer, bool AllowRValues, bool IsLValueRef, | ||||
4559 | InitializationSequence &Sequence) { | ||||
4560 | QualType DestType = Entity.getType(); | ||||
4561 | QualType cv1T1 = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||
4562 | QualType T1 = cv1T1.getUnqualifiedType(); | ||||
4563 | QualType cv2T2 = Initializer->getType(); | ||||
4564 | QualType T2 = cv2T2.getUnqualifiedType(); | ||||
4565 | |||||
4566 | assert(!S.CompareReferenceRelationship(Initializer->getBeginLoc(), T1, T2) &&(static_cast <bool> (!S.CompareReferenceRelationship(Initializer ->getBeginLoc(), T1, T2) && "Must have incompatible references when binding via conversion" ) ? void (0) : __assert_fail ("!S.CompareReferenceRelationship(Initializer->getBeginLoc(), T1, T2) && \"Must have incompatible references when binding via conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4567, __extension__ __PRETTY_FUNCTION__)) | ||||
4567 | "Must have incompatible references when binding via conversion")(static_cast <bool> (!S.CompareReferenceRelationship(Initializer ->getBeginLoc(), T1, T2) && "Must have incompatible references when binding via conversion" ) ? void (0) : __assert_fail ("!S.CompareReferenceRelationship(Initializer->getBeginLoc(), T1, T2) && \"Must have incompatible references when binding via conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4567, __extension__ __PRETTY_FUNCTION__)); | ||||
4568 | |||||
4569 | // Build the candidate set directly in the initialization sequence | ||||
4570 | // structure, so that it will persist if we fail. | ||||
4571 | OverloadCandidateSet &CandidateSet = Sequence.getFailedCandidateSet(); | ||||
4572 | CandidateSet.clear(OverloadCandidateSet::CSK_InitByUserDefinedConversion); | ||||
4573 | |||||
4574 | // Determine whether we are allowed to call explicit conversion operators. | ||||
4575 | // Note that none of [over.match.copy], [over.match.conv], nor | ||||
4576 | // [over.match.ref] permit an explicit constructor to be chosen when | ||||
4577 | // initializing a reference, not even for direct-initialization. | ||||
4578 | bool AllowExplicitCtors = false; | ||||
4579 | bool AllowExplicitConvs = Kind.allowExplicitConversionFunctionsInRefBinding(); | ||||
4580 | |||||
4581 | const RecordType *T1RecordType = nullptr; | ||||
4582 | if (AllowRValues && (T1RecordType = T1->getAs<RecordType>()) && | ||||
4583 | S.isCompleteType(Kind.getLocation(), T1)) { | ||||
4584 | // The type we're converting to is a class type. Enumerate its constructors | ||||
4585 | // to see if there is a suitable conversion. | ||||
4586 | CXXRecordDecl *T1RecordDecl = cast<CXXRecordDecl>(T1RecordType->getDecl()); | ||||
4587 | |||||
4588 | for (NamedDecl *D : S.LookupConstructors(T1RecordDecl)) { | ||||
4589 | auto Info = getConstructorInfo(D); | ||||
4590 | if (!Info.Constructor) | ||||
4591 | continue; | ||||
4592 | |||||
4593 | if (!Info.Constructor->isInvalidDecl() && | ||||
4594 | Info.Constructor->isConvertingConstructor(/*AllowExplicit*/true)) { | ||||
4595 | if (Info.ConstructorTmpl) | ||||
4596 | S.AddTemplateOverloadCandidate( | ||||
4597 | Info.ConstructorTmpl, Info.FoundDecl, | ||||
4598 | /*ExplicitArgs*/ nullptr, Initializer, CandidateSet, | ||||
4599 | /*SuppressUserConversions=*/true, | ||||
4600 | /*PartialOverloading*/ false, AllowExplicitCtors); | ||||
4601 | else | ||||
4602 | S.AddOverloadCandidate( | ||||
4603 | Info.Constructor, Info.FoundDecl, Initializer, CandidateSet, | ||||
4604 | /*SuppressUserConversions=*/true, | ||||
4605 | /*PartialOverloading*/ false, AllowExplicitCtors); | ||||
4606 | } | ||||
4607 | } | ||||
4608 | } | ||||
4609 | if (T1RecordType && T1RecordType->getDecl()->isInvalidDecl()) | ||||
4610 | return OR_No_Viable_Function; | ||||
4611 | |||||
4612 | const RecordType *T2RecordType = nullptr; | ||||
4613 | if ((T2RecordType = T2->getAs<RecordType>()) && | ||||
4614 | S.isCompleteType(Kind.getLocation(), T2)) { | ||||
4615 | // The type we're converting from is a class type, enumerate its conversion | ||||
4616 | // functions. | ||||
4617 | CXXRecordDecl *T2RecordDecl = cast<CXXRecordDecl>(T2RecordType->getDecl()); | ||||
4618 | |||||
4619 | const auto &Conversions = T2RecordDecl->getVisibleConversionFunctions(); | ||||
4620 | for (auto I = Conversions.begin(), E = Conversions.end(); I != E; ++I) { | ||||
4621 | NamedDecl *D = *I; | ||||
4622 | CXXRecordDecl *ActingDC = cast<CXXRecordDecl>(D->getDeclContext()); | ||||
4623 | if (isa<UsingShadowDecl>(D)) | ||||
4624 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); | ||||
4625 | |||||
4626 | FunctionTemplateDecl *ConvTemplate = dyn_cast<FunctionTemplateDecl>(D); | ||||
4627 | CXXConversionDecl *Conv; | ||||
4628 | if (ConvTemplate) | ||||
4629 | Conv = cast<CXXConversionDecl>(ConvTemplate->getTemplatedDecl()); | ||||
4630 | else | ||||
4631 | Conv = cast<CXXConversionDecl>(D); | ||||
4632 | |||||
4633 | // If the conversion function doesn't return a reference type, | ||||
4634 | // it can't be considered for this conversion unless we're allowed to | ||||
4635 | // consider rvalues. | ||||
4636 | // FIXME: Do we need to make sure that we only consider conversion | ||||
4637 | // candidates with reference-compatible results? That might be needed to | ||||
4638 | // break recursion. | ||||
4639 | if ((AllowRValues || | ||||
4640 | Conv->getConversionType()->isLValueReferenceType())) { | ||||
4641 | if (ConvTemplate) | ||||
4642 | S.AddTemplateConversionCandidate( | ||||
4643 | ConvTemplate, I.getPair(), ActingDC, Initializer, DestType, | ||||
4644 | CandidateSet, | ||||
4645 | /*AllowObjCConversionOnExplicit=*/false, AllowExplicitConvs); | ||||
4646 | else | ||||
4647 | S.AddConversionCandidate( | ||||
4648 | Conv, I.getPair(), ActingDC, Initializer, DestType, CandidateSet, | ||||
4649 | /*AllowObjCConversionOnExplicit=*/false, AllowExplicitConvs); | ||||
4650 | } | ||||
4651 | } | ||||
4652 | } | ||||
4653 | if (T2RecordType && T2RecordType->getDecl()->isInvalidDecl()) | ||||
4654 | return OR_No_Viable_Function; | ||||
4655 | |||||
4656 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||
4657 | |||||
4658 | // Perform overload resolution. If it fails, return the failed result. | ||||
4659 | OverloadCandidateSet::iterator Best; | ||||
4660 | if (OverloadingResult Result | ||||
4661 | = CandidateSet.BestViableFunction(S, DeclLoc, Best)) | ||||
4662 | return Result; | ||||
4663 | |||||
4664 | FunctionDecl *Function = Best->Function; | ||||
4665 | // This is the overload that will be used for this initialization step if we | ||||
4666 | // use this initialization. Mark it as referenced. | ||||
4667 | Function->setReferenced(); | ||||
4668 | |||||
4669 | // Compute the returned type and value kind of the conversion. | ||||
4670 | QualType cv3T3; | ||||
4671 | if (isa<CXXConversionDecl>(Function)) | ||||
4672 | cv3T3 = Function->getReturnType(); | ||||
4673 | else | ||||
4674 | cv3T3 = T1; | ||||
4675 | |||||
4676 | ExprValueKind VK = VK_PRValue; | ||||
4677 | if (cv3T3->isLValueReferenceType()) | ||||
4678 | VK = VK_LValue; | ||||
4679 | else if (const auto *RRef = cv3T3->getAs<RValueReferenceType>()) | ||||
4680 | VK = RRef->getPointeeType()->isFunctionType() ? VK_LValue : VK_XValue; | ||||
4681 | cv3T3 = cv3T3.getNonLValueExprType(S.Context); | ||||
4682 | |||||
4683 | // Add the user-defined conversion step. | ||||
4684 | bool HadMultipleCandidates = (CandidateSet.size() > 1); | ||||
4685 | Sequence.AddUserConversionStep(Function, Best->FoundDecl, cv3T3, | ||||
4686 | HadMultipleCandidates); | ||||
4687 | |||||
4688 | // Determine whether we'll need to perform derived-to-base adjustments or | ||||
4689 | // other conversions. | ||||
4690 | Sema::ReferenceConversions RefConv; | ||||
4691 | Sema::ReferenceCompareResult NewRefRelationship = | ||||
4692 | S.CompareReferenceRelationship(DeclLoc, T1, cv3T3, &RefConv); | ||||
4693 | |||||
4694 | // Add the final conversion sequence, if necessary. | ||||
4695 | if (NewRefRelationship == Sema::Ref_Incompatible) { | ||||
4696 | assert(!isa<CXXConstructorDecl>(Function) &&(static_cast <bool> (!isa<CXXConstructorDecl>(Function ) && "should not have conversion after constructor") ? void (0) : __assert_fail ("!isa<CXXConstructorDecl>(Function) && \"should not have conversion after constructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4697, __extension__ __PRETTY_FUNCTION__)) | ||||
4697 | "should not have conversion after constructor")(static_cast <bool> (!isa<CXXConstructorDecl>(Function ) && "should not have conversion after constructor") ? void (0) : __assert_fail ("!isa<CXXConstructorDecl>(Function) && \"should not have conversion after constructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4697, __extension__ __PRETTY_FUNCTION__)); | ||||
4698 | |||||
4699 | ImplicitConversionSequence ICS; | ||||
4700 | ICS.setStandard(); | ||||
4701 | ICS.Standard = Best->FinalConversion; | ||||
4702 | Sequence.AddConversionSequenceStep(ICS, ICS.Standard.getToType(2)); | ||||
4703 | |||||
4704 | // Every implicit conversion results in a prvalue, except for a glvalue | ||||
4705 | // derived-to-base conversion, which we handle below. | ||||
4706 | cv3T3 = ICS.Standard.getToType(2); | ||||
4707 | VK = VK_PRValue; | ||||
4708 | } | ||||
4709 | |||||
4710 | // If the converted initializer is a prvalue, its type T4 is adjusted to | ||||
4711 | // type "cv1 T4" and the temporary materialization conversion is applied. | ||||
4712 | // | ||||
4713 | // We adjust the cv-qualifications to match the reference regardless of | ||||
4714 | // whether we have a prvalue so that the AST records the change. In this | ||||
4715 | // case, T4 is "cv3 T3". | ||||
4716 | QualType cv1T4 = S.Context.getQualifiedType(cv3T3, cv1T1.getQualifiers()); | ||||
4717 | if (cv1T4.getQualifiers() != cv3T3.getQualifiers()) | ||||
4718 | Sequence.AddQualificationConversionStep(cv1T4, VK); | ||||
4719 | Sequence.AddReferenceBindingStep(cv1T4, VK == VK_PRValue); | ||||
4720 | VK = IsLValueRef ? VK_LValue : VK_XValue; | ||||
4721 | |||||
4722 | if (RefConv & Sema::ReferenceConversions::DerivedToBase) | ||||
4723 | Sequence.AddDerivedToBaseCastStep(cv1T1, VK); | ||||
4724 | else if (RefConv & Sema::ReferenceConversions::ObjC) | ||||
4725 | Sequence.AddObjCObjectConversionStep(cv1T1); | ||||
4726 | else if (RefConv & Sema::ReferenceConversions::Function) | ||||
4727 | Sequence.AddFunctionReferenceConversionStep(cv1T1); | ||||
4728 | else if (RefConv & Sema::ReferenceConversions::Qualification) { | ||||
4729 | if (!S.Context.hasSameType(cv1T4, cv1T1)) | ||||
4730 | Sequence.AddQualificationConversionStep(cv1T1, VK); | ||||
4731 | } | ||||
4732 | |||||
4733 | return OR_Success; | ||||
4734 | } | ||||
4735 | |||||
4736 | static void CheckCXX98CompatAccessibleCopy(Sema &S, | ||||
4737 | const InitializedEntity &Entity, | ||||
4738 | Expr *CurInitExpr); | ||||
4739 | |||||
4740 | /// Attempt reference initialization (C++0x [dcl.init.ref]) | ||||
4741 | static void TryReferenceInitialization(Sema &S, | ||||
4742 | const InitializedEntity &Entity, | ||||
4743 | const InitializationKind &Kind, | ||||
4744 | Expr *Initializer, | ||||
4745 | InitializationSequence &Sequence) { | ||||
4746 | QualType DestType = Entity.getType(); | ||||
4747 | QualType cv1T1 = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||
4748 | Qualifiers T1Quals; | ||||
4749 | QualType T1 = S.Context.getUnqualifiedArrayType(cv1T1, T1Quals); | ||||
4750 | QualType cv2T2 = S.getCompletedType(Initializer); | ||||
4751 | Qualifiers T2Quals; | ||||
4752 | QualType T2 = S.Context.getUnqualifiedArrayType(cv2T2, T2Quals); | ||||
4753 | |||||
4754 | // If the initializer is the address of an overloaded function, try | ||||
4755 | // to resolve the overloaded function. If all goes well, T2 is the | ||||
4756 | // type of the resulting function. | ||||
4757 | if (ResolveOverloadedFunctionForReferenceBinding(S, Initializer, cv2T2, T2, | ||||
4758 | T1, Sequence)) | ||||
4759 | return; | ||||
4760 | |||||
4761 | // Delegate everything else to a subfunction. | ||||
4762 | TryReferenceInitializationCore(S, Entity, Kind, Initializer, cv1T1, T1, | ||||
4763 | T1Quals, cv2T2, T2, T2Quals, Sequence); | ||||
4764 | } | ||||
4765 | |||||
4766 | /// Determine whether an expression is a non-referenceable glvalue (one to | ||||
4767 | /// which a reference can never bind). Attempting to bind a reference to | ||||
4768 | /// such a glvalue will always create a temporary. | ||||
4769 | static bool isNonReferenceableGLValue(Expr *E) { | ||||
4770 | return E->refersToBitField() || E->refersToVectorElement() || | ||||
4771 | E->refersToMatrixElement(); | ||||
4772 | } | ||||
4773 | |||||
4774 | /// Reference initialization without resolving overloaded functions. | ||||
4775 | /// | ||||
4776 | /// We also can get here in C if we call a builtin which is declared as | ||||
4777 | /// a function with a parameter of reference type (such as __builtin_va_end()). | ||||
4778 | static void TryReferenceInitializationCore(Sema &S, | ||||
4779 | const InitializedEntity &Entity, | ||||
4780 | const InitializationKind &Kind, | ||||
4781 | Expr *Initializer, | ||||
4782 | QualType cv1T1, QualType T1, | ||||
4783 | Qualifiers T1Quals, | ||||
4784 | QualType cv2T2, QualType T2, | ||||
4785 | Qualifiers T2Quals, | ||||
4786 | InitializationSequence &Sequence) { | ||||
4787 | QualType DestType = Entity.getType(); | ||||
4788 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||
4789 | |||||
4790 | // Compute some basic properties of the types and the initializer. | ||||
4791 | bool isLValueRef = DestType->isLValueReferenceType(); | ||||
4792 | bool isRValueRef = !isLValueRef; | ||||
4793 | Expr::Classification InitCategory = Initializer->Classify(S.Context); | ||||
4794 | |||||
4795 | Sema::ReferenceConversions RefConv; | ||||
4796 | Sema::ReferenceCompareResult RefRelationship = | ||||
4797 | S.CompareReferenceRelationship(DeclLoc, cv1T1, cv2T2, &RefConv); | ||||
4798 | |||||
4799 | // C++0x [dcl.init.ref]p5: | ||||
4800 | // A reference to type "cv1 T1" is initialized by an expression of type | ||||
4801 | // "cv2 T2" as follows: | ||||
4802 | // | ||||
4803 | // - If the reference is an lvalue reference and the initializer | ||||
4804 | // expression | ||||
4805 | // Note the analogous bullet points for rvalue refs to functions. Because | ||||
4806 | // there are no function rvalues in C++, rvalue refs to functions are treated | ||||
4807 | // like lvalue refs. | ||||
4808 | OverloadingResult ConvOvlResult = OR_Success; | ||||
4809 | bool T1Function = T1->isFunctionType(); | ||||
4810 | if (isLValueRef || T1Function) { | ||||
4811 | if (InitCategory.isLValue() && !isNonReferenceableGLValue(Initializer) && | ||||
4812 | (RefRelationship == Sema::Ref_Compatible || | ||||
4813 | (Kind.isCStyleOrFunctionalCast() && | ||||
4814 | RefRelationship == Sema::Ref_Related))) { | ||||
4815 | // - is an lvalue (but is not a bit-field), and "cv1 T1" is | ||||
4816 | // reference-compatible with "cv2 T2," or | ||||
4817 | if (RefConv & (Sema::ReferenceConversions::DerivedToBase | | ||||
4818 | Sema::ReferenceConversions::ObjC)) { | ||||
4819 | // If we're converting the pointee, add any qualifiers first; | ||||
4820 | // these qualifiers must all be top-level, so just convert to "cv1 T2". | ||||
4821 | if (RefConv & (Sema::ReferenceConversions::Qualification)) | ||||
4822 | Sequence.AddQualificationConversionStep( | ||||
4823 | S.Context.getQualifiedType(T2, T1Quals), | ||||
4824 | Initializer->getValueKind()); | ||||
4825 | if (RefConv & Sema::ReferenceConversions::DerivedToBase) | ||||
4826 | Sequence.AddDerivedToBaseCastStep(cv1T1, VK_LValue); | ||||
4827 | else | ||||
4828 | Sequence.AddObjCObjectConversionStep(cv1T1); | ||||
4829 | } else if (RefConv & Sema::ReferenceConversions::Qualification) { | ||||
4830 | // Perform a (possibly multi-level) qualification conversion. | ||||
4831 | Sequence.AddQualificationConversionStep(cv1T1, | ||||
4832 | Initializer->getValueKind()); | ||||
4833 | } else if (RefConv & Sema::ReferenceConversions::Function) { | ||||
4834 | Sequence.AddFunctionReferenceConversionStep(cv1T1); | ||||
4835 | } | ||||
4836 | |||||
4837 | // We only create a temporary here when binding a reference to a | ||||
4838 | // bit-field or vector element. Those cases are't supposed to be | ||||
4839 | // handled by this bullet, but the outcome is the same either way. | ||||
4840 | Sequence.AddReferenceBindingStep(cv1T1, false); | ||||
4841 | return; | ||||
4842 | } | ||||
4843 | |||||
4844 | // - has a class type (i.e., T2 is a class type), where T1 is not | ||||
4845 | // reference-related to T2, and can be implicitly converted to an | ||||
4846 | // lvalue of type "cv3 T3," where "cv1 T1" is reference-compatible | ||||
4847 | // with "cv3 T3" (this conversion is selected by enumerating the | ||||
4848 | // applicable conversion functions (13.3.1.6) and choosing the best | ||||
4849 | // one through overload resolution (13.3)), | ||||
4850 | // If we have an rvalue ref to function type here, the rhs must be | ||||
4851 | // an rvalue. DR1287 removed the "implicitly" here. | ||||
4852 | if (RefRelationship == Sema::Ref_Incompatible && T2->isRecordType() && | ||||
4853 | (isLValueRef || InitCategory.isRValue())) { | ||||
4854 | if (S.getLangOpts().CPlusPlus) { | ||||
4855 | // Try conversion functions only for C++. | ||||
4856 | ConvOvlResult = TryRefInitWithConversionFunction( | ||||
4857 | S, Entity, Kind, Initializer, /*AllowRValues*/ isRValueRef, | ||||
4858 | /*IsLValueRef*/ isLValueRef, Sequence); | ||||
4859 | if (ConvOvlResult == OR_Success) | ||||
4860 | return; | ||||
4861 | if (ConvOvlResult != OR_No_Viable_Function) | ||||
4862 | Sequence.SetOverloadFailure( | ||||
4863 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||
4864 | ConvOvlResult); | ||||
4865 | } else { | ||||
4866 | ConvOvlResult = OR_No_Viable_Function; | ||||
4867 | } | ||||
4868 | } | ||||
4869 | } | ||||
4870 | |||||
4871 | // - Otherwise, the reference shall be an lvalue reference to a | ||||
4872 | // non-volatile const type (i.e., cv1 shall be const), or the reference | ||||
4873 | // shall be an rvalue reference. | ||||
4874 | // For address spaces, we interpret this to mean that an addr space | ||||
4875 | // of a reference "cv1 T1" is a superset of addr space of "cv2 T2". | ||||
4876 | if (isLValueRef && !(T1Quals.hasConst() && !T1Quals.hasVolatile() && | ||||
4877 | T1Quals.isAddressSpaceSupersetOf(T2Quals))) { | ||||
4878 | if (S.Context.getCanonicalType(T2) == S.Context.OverloadTy) | ||||
4879 | Sequence.SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||
4880 | else if (ConvOvlResult && !Sequence.getFailedCandidateSet().empty()) | ||||
4881 | Sequence.SetOverloadFailure( | ||||
4882 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||
4883 | ConvOvlResult); | ||||
4884 | else if (!InitCategory.isLValue()) | ||||
4885 | Sequence.SetFailed( | ||||
4886 | T1Quals.isAddressSpaceSupersetOf(T2Quals) | ||||
4887 | ? InitializationSequence:: | ||||
4888 | FK_NonConstLValueReferenceBindingToTemporary | ||||
4889 | : InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||
4890 | else { | ||||
4891 | InitializationSequence::FailureKind FK; | ||||
4892 | switch (RefRelationship) { | ||||
4893 | case Sema::Ref_Compatible: | ||||
4894 | if (Initializer->refersToBitField()) | ||||
4895 | FK = InitializationSequence:: | ||||
4896 | FK_NonConstLValueReferenceBindingToBitfield; | ||||
4897 | else if (Initializer->refersToVectorElement()) | ||||
4898 | FK = InitializationSequence:: | ||||
4899 | FK_NonConstLValueReferenceBindingToVectorElement; | ||||
4900 | else if (Initializer->refersToMatrixElement()) | ||||
4901 | FK = InitializationSequence:: | ||||
4902 | FK_NonConstLValueReferenceBindingToMatrixElement; | ||||
4903 | else | ||||
4904 | llvm_unreachable("unexpected kind of compatible initializer")::llvm::llvm_unreachable_internal("unexpected kind of compatible initializer" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 4904); | ||||
4905 | break; | ||||
4906 | case Sema::Ref_Related: | ||||
4907 | FK = InitializationSequence::FK_ReferenceInitDropsQualifiers; | ||||
4908 | break; | ||||
4909 | case Sema::Ref_Incompatible: | ||||
4910 | FK = InitializationSequence:: | ||||
4911 | FK_NonConstLValueReferenceBindingToUnrelated; | ||||
4912 | break; | ||||
4913 | } | ||||
4914 | Sequence.SetFailed(FK); | ||||
4915 | } | ||||
4916 | return; | ||||
4917 | } | ||||
4918 | |||||
4919 | // - If the initializer expression | ||||
4920 | // - is an | ||||
4921 | // [<=14] xvalue (but not a bit-field), class prvalue, array prvalue, or | ||||
4922 | // [1z] rvalue (but not a bit-field) or | ||||
4923 | // function lvalue and "cv1 T1" is reference-compatible with "cv2 T2" | ||||
4924 | // | ||||
4925 | // Note: functions are handled above and below rather than here... | ||||
4926 | if (!T1Function && | ||||
4927 | (RefRelationship == Sema::Ref_Compatible || | ||||
4928 | (Kind.isCStyleOrFunctionalCast() && | ||||
4929 | RefRelationship == Sema::Ref_Related)) && | ||||
4930 | ((InitCategory.isXValue() && !isNonReferenceableGLValue(Initializer)) || | ||||
4931 | (InitCategory.isPRValue() && | ||||
4932 | (S.getLangOpts().CPlusPlus17 || T2->isRecordType() || | ||||
4933 | T2->isArrayType())))) { | ||||
4934 | ExprValueKind ValueKind = InitCategory.isXValue() ? VK_XValue : VK_PRValue; | ||||
4935 | if (InitCategory.isPRValue() && T2->isRecordType()) { | ||||
4936 | // The corresponding bullet in C++03 [dcl.init.ref]p5 gives the | ||||
4937 | // compiler the freedom to perform a copy here or bind to the | ||||
4938 | // object, while C++0x requires that we bind directly to the | ||||
4939 | // object. Hence, we always bind to the object without making an | ||||
4940 | // extra copy. However, in C++03 requires that we check for the | ||||
4941 | // presence of a suitable copy constructor: | ||||
4942 | // | ||||
4943 | // The constructor that would be used to make the copy shall | ||||
4944 | // be callable whether or not the copy is actually done. | ||||
4945 | if (!S.getLangOpts().CPlusPlus11 && !S.getLangOpts().MicrosoftExt) | ||||
4946 | Sequence.AddExtraneousCopyToTemporary(cv2T2); | ||||
4947 | else if (S.getLangOpts().CPlusPlus11) | ||||
4948 | CheckCXX98CompatAccessibleCopy(S, Entity, Initializer); | ||||
4949 | } | ||||
4950 | |||||
4951 | // C++1z [dcl.init.ref]/5.2.1.2: | ||||
4952 | // If the converted initializer is a prvalue, its type T4 is adjusted | ||||
4953 | // to type "cv1 T4" and the temporary materialization conversion is | ||||
4954 | // applied. | ||||
4955 | // Postpone address space conversions to after the temporary materialization | ||||
4956 | // conversion to allow creating temporaries in the alloca address space. | ||||
4957 | auto T1QualsIgnoreAS = T1Quals; | ||||
4958 | auto T2QualsIgnoreAS = T2Quals; | ||||
4959 | if (T1Quals.getAddressSpace() != T2Quals.getAddressSpace()) { | ||||
4960 | T1QualsIgnoreAS.removeAddressSpace(); | ||||
4961 | T2QualsIgnoreAS.removeAddressSpace(); | ||||
4962 | } | ||||
4963 | QualType cv1T4 = S.Context.getQualifiedType(cv2T2, T1QualsIgnoreAS); | ||||
4964 | if (T1QualsIgnoreAS != T2QualsIgnoreAS) | ||||
4965 | Sequence.AddQualificationConversionStep(cv1T4, ValueKind); | ||||
4966 | Sequence.AddReferenceBindingStep(cv1T4, ValueKind == VK_PRValue); | ||||
4967 | ValueKind = isLValueRef ? VK_LValue : VK_XValue; | ||||
4968 | // Add addr space conversion if required. | ||||
4969 | if (T1Quals.getAddressSpace() != T2Quals.getAddressSpace()) { | ||||
4970 | auto T4Quals = cv1T4.getQualifiers(); | ||||
4971 | T4Quals.addAddressSpace(T1Quals.getAddressSpace()); | ||||
4972 | QualType cv1T4WithAS = S.Context.getQualifiedType(T2, T4Quals); | ||||
4973 | Sequence.AddQualificationConversionStep(cv1T4WithAS, ValueKind); | ||||
4974 | cv1T4 = cv1T4WithAS; | ||||
4975 | } | ||||
4976 | |||||
4977 | // In any case, the reference is bound to the resulting glvalue (or to | ||||
4978 | // an appropriate base class subobject). | ||||
4979 | if (RefConv & Sema::ReferenceConversions::DerivedToBase) | ||||
4980 | Sequence.AddDerivedToBaseCastStep(cv1T1, ValueKind); | ||||
4981 | else if (RefConv & Sema::ReferenceConversions::ObjC) | ||||
4982 | Sequence.AddObjCObjectConversionStep(cv1T1); | ||||
4983 | else if (RefConv & Sema::ReferenceConversions::Qualification) { | ||||
4984 | if (!S.Context.hasSameType(cv1T4, cv1T1)) | ||||
4985 | Sequence.AddQualificationConversionStep(cv1T1, ValueKind); | ||||
4986 | } | ||||
4987 | return; | ||||
4988 | } | ||||
4989 | |||||
4990 | // - has a class type (i.e., T2 is a class type), where T1 is not | ||||
4991 | // reference-related to T2, and can be implicitly converted to an | ||||
4992 | // xvalue, class prvalue, or function lvalue of type "cv3 T3", | ||||
4993 | // where "cv1 T1" is reference-compatible with "cv3 T3", | ||||
4994 | // | ||||
4995 | // DR1287 removes the "implicitly" here. | ||||
4996 | if (T2->isRecordType()) { | ||||
4997 | if (RefRelationship == Sema::Ref_Incompatible) { | ||||
4998 | ConvOvlResult = TryRefInitWithConversionFunction( | ||||
4999 | S, Entity, Kind, Initializer, /*AllowRValues*/ true, | ||||
5000 | /*IsLValueRef*/ isLValueRef, Sequence); | ||||
5001 | if (ConvOvlResult) | ||||
5002 | Sequence.SetOverloadFailure( | ||||
5003 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||
5004 | ConvOvlResult); | ||||
5005 | |||||
5006 | return; | ||||
5007 | } | ||||
5008 | |||||
5009 | if (RefRelationship == Sema::Ref_Compatible && | ||||
5010 | isRValueRef && InitCategory.isLValue()) { | ||||
5011 | Sequence.SetFailed( | ||||
5012 | InitializationSequence::FK_RValueReferenceBindingToLValue); | ||||
5013 | return; | ||||
5014 | } | ||||
5015 | |||||
5016 | Sequence.SetFailed(InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||
5017 | return; | ||||
5018 | } | ||||
5019 | |||||
5020 | // - Otherwise, a temporary of type "cv1 T1" is created and initialized | ||||
5021 | // from the initializer expression using the rules for a non-reference | ||||
5022 | // copy-initialization (8.5). The reference is then bound to the | ||||
5023 | // temporary. [...] | ||||
5024 | |||||
5025 | // Ignore address space of reference type at this point and perform address | ||||
5026 | // space conversion after the reference binding step. | ||||
5027 | QualType cv1T1IgnoreAS = | ||||
5028 | T1Quals.hasAddressSpace() | ||||
5029 | ? S.Context.getQualifiedType(T1, T1Quals.withoutAddressSpace()) | ||||
5030 | : cv1T1; | ||||
5031 | |||||
5032 | InitializedEntity TempEntity = | ||||
5033 | InitializedEntity::InitializeTemporary(cv1T1IgnoreAS); | ||||
5034 | |||||
5035 | // FIXME: Why do we use an implicit conversion here rather than trying | ||||
5036 | // copy-initialization? | ||||
5037 | ImplicitConversionSequence ICS | ||||
5038 | = S.TryImplicitConversion(Initializer, TempEntity.getType(), | ||||
5039 | /*SuppressUserConversions=*/false, | ||||
5040 | Sema::AllowedExplicit::None, | ||||
5041 | /*FIXME:InOverloadResolution=*/false, | ||||
5042 | /*CStyle=*/Kind.isCStyleOrFunctionalCast(), | ||||
5043 | /*AllowObjCWritebackConversion=*/false); | ||||
5044 | |||||
5045 | if (ICS.isBad()) { | ||||
5046 | // FIXME: Use the conversion function set stored in ICS to turn | ||||
5047 | // this into an overloading ambiguity diagnostic. However, we need | ||||
5048 | // to keep that set as an OverloadCandidateSet rather than as some | ||||
5049 | // other kind of set. | ||||
5050 | if (ConvOvlResult && !Sequence.getFailedCandidateSet().empty()) | ||||
5051 | Sequence.SetOverloadFailure( | ||||
5052 | InitializationSequence::FK_ReferenceInitOverloadFailed, | ||||
5053 | ConvOvlResult); | ||||
5054 | else if (S.Context.getCanonicalType(T2) == S.Context.OverloadTy) | ||||
5055 | Sequence.SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||
5056 | else | ||||
5057 | Sequence.SetFailed(InitializationSequence::FK_ReferenceInitFailed); | ||||
5058 | return; | ||||
5059 | } else { | ||||
5060 | Sequence.AddConversionSequenceStep(ICS, TempEntity.getType()); | ||||
5061 | } | ||||
5062 | |||||
5063 | // [...] If T1 is reference-related to T2, cv1 must be the | ||||
5064 | // same cv-qualification as, or greater cv-qualification | ||||
5065 | // than, cv2; otherwise, the program is ill-formed. | ||||
5066 | unsigned T1CVRQuals = T1Quals.getCVRQualifiers(); | ||||
5067 | unsigned T2CVRQuals = T2Quals.getCVRQualifiers(); | ||||
5068 | if (RefRelationship == Sema::Ref_Related && | ||||
5069 | ((T1CVRQuals | T2CVRQuals) != T1CVRQuals || | ||||
5070 | !T1Quals.isAddressSpaceSupersetOf(T2Quals))) { | ||||
5071 | Sequence.SetFailed(InitializationSequence::FK_ReferenceInitDropsQualifiers); | ||||
5072 | return; | ||||
5073 | } | ||||
5074 | |||||
5075 | // [...] If T1 is reference-related to T2 and the reference is an rvalue | ||||
5076 | // reference, the initializer expression shall not be an lvalue. | ||||
5077 | if (RefRelationship >= Sema::Ref_Related && !isLValueRef && | ||||
5078 | InitCategory.isLValue()) { | ||||
5079 | Sequence.SetFailed( | ||||
5080 | InitializationSequence::FK_RValueReferenceBindingToLValue); | ||||
5081 | return; | ||||
5082 | } | ||||
5083 | |||||
5084 | Sequence.AddReferenceBindingStep(cv1T1IgnoreAS, /*BindingTemporary=*/true); | ||||
5085 | |||||
5086 | if (T1Quals.hasAddressSpace()) { | ||||
5087 | if (!Qualifiers::isAddressSpaceSupersetOf(T1Quals.getAddressSpace(), | ||||
5088 | LangAS::Default)) { | ||||
5089 | Sequence.SetFailed( | ||||
5090 | InitializationSequence::FK_ReferenceAddrspaceMismatchTemporary); | ||||
5091 | return; | ||||
5092 | } | ||||
5093 | Sequence.AddQualificationConversionStep(cv1T1, isLValueRef ? VK_LValue | ||||
5094 | : VK_XValue); | ||||
5095 | } | ||||
5096 | } | ||||
5097 | |||||
5098 | /// Attempt character array initialization from a string literal | ||||
5099 | /// (C++ [dcl.init.string], C99 6.7.8). | ||||
5100 | static void TryStringLiteralInitialization(Sema &S, | ||||
5101 | const InitializedEntity &Entity, | ||||
5102 | const InitializationKind &Kind, | ||||
5103 | Expr *Initializer, | ||||
5104 | InitializationSequence &Sequence) { | ||||
5105 | Sequence.AddStringInitStep(Entity.getType()); | ||||
5106 | } | ||||
5107 | |||||
5108 | /// Attempt value initialization (C++ [dcl.init]p7). | ||||
5109 | static void TryValueInitialization(Sema &S, | ||||
5110 | const InitializedEntity &Entity, | ||||
5111 | const InitializationKind &Kind, | ||||
5112 | InitializationSequence &Sequence, | ||||
5113 | InitListExpr *InitList) { | ||||
5114 | assert((!InitList || InitList->getNumInits() == 0) &&(static_cast <bool> ((!InitList || InitList->getNumInits () == 0) && "Shouldn't use value-init for non-empty init lists" ) ? void (0) : __assert_fail ("(!InitList || InitList->getNumInits() == 0) && \"Shouldn't use value-init for non-empty init lists\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5115, __extension__ __PRETTY_FUNCTION__)) | ||||
5115 | "Shouldn't use value-init for non-empty init lists")(static_cast <bool> ((!InitList || InitList->getNumInits () == 0) && "Shouldn't use value-init for non-empty init lists" ) ? void (0) : __assert_fail ("(!InitList || InitList->getNumInits() == 0) && \"Shouldn't use value-init for non-empty init lists\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5115, __extension__ __PRETTY_FUNCTION__)); | ||||
5116 | |||||
5117 | // C++98 [dcl.init]p5, C++11 [dcl.init]p7: | ||||
5118 | // | ||||
5119 | // To value-initialize an object of type T means: | ||||
5120 | QualType T = Entity.getType(); | ||||
5121 | |||||
5122 | // -- if T is an array type, then each element is value-initialized; | ||||
5123 | T = S.Context.getBaseElementType(T); | ||||
5124 | |||||
5125 | if (const RecordType *RT = T->getAs<RecordType>()) { | ||||
5126 | if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) { | ||||
5127 | bool NeedZeroInitialization = true; | ||||
5128 | // C++98: | ||||
5129 | // -- if T is a class type (clause 9) with a user-declared constructor | ||||
5130 | // (12.1), then the default constructor for T is called (and the | ||||
5131 | // initialization is ill-formed if T has no accessible default | ||||
5132 | // constructor); | ||||
5133 | // C++11: | ||||
5134 | // -- if T is a class type (clause 9) with either no default constructor | ||||
5135 | // (12.1 [class.ctor]) or a default constructor that is user-provided | ||||
5136 | // or deleted, then the object is default-initialized; | ||||
5137 | // | ||||
5138 | // Note that the C++11 rule is the same as the C++98 rule if there are no | ||||
5139 | // defaulted or deleted constructors, so we just use it unconditionally. | ||||
5140 | CXXConstructorDecl *CD = S.LookupDefaultConstructor(ClassDecl); | ||||
5141 | if (!CD || !CD->getCanonicalDecl()->isDefaulted() || CD->isDeleted()) | ||||
5142 | NeedZeroInitialization = false; | ||||
5143 | |||||
5144 | // -- if T is a (possibly cv-qualified) non-union class type without a | ||||
5145 | // user-provided or deleted default constructor, then the object is | ||||
5146 | // zero-initialized and, if T has a non-trivial default constructor, | ||||
5147 | // default-initialized; | ||||
5148 | // The 'non-union' here was removed by DR1502. The 'non-trivial default | ||||
5149 | // constructor' part was removed by DR1507. | ||||
5150 | if (NeedZeroInitialization) | ||||
5151 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||
5152 | |||||
5153 | // C++03: | ||||
5154 | // -- if T is a non-union class type without a user-declared constructor, | ||||
5155 | // then every non-static data member and base class component of T is | ||||
5156 | // value-initialized; | ||||
5157 | // [...] A program that calls for [...] value-initialization of an | ||||
5158 | // entity of reference type is ill-formed. | ||||
5159 | // | ||||
5160 | // C++11 doesn't need this handling, because value-initialization does not | ||||
5161 | // occur recursively there, and the implicit default constructor is | ||||
5162 | // defined as deleted in the problematic cases. | ||||
5163 | if (!S.getLangOpts().CPlusPlus11 && | ||||
5164 | ClassDecl->hasUninitializedReferenceMember()) { | ||||
5165 | Sequence.SetFailed(InitializationSequence::FK_TooManyInitsForReference); | ||||
5166 | return; | ||||
5167 | } | ||||
5168 | |||||
5169 | // If this is list-value-initialization, pass the empty init list on when | ||||
5170 | // building the constructor call. This affects the semantics of a few | ||||
5171 | // things (such as whether an explicit default constructor can be called). | ||||
5172 | Expr *InitListAsExpr = InitList; | ||||
5173 | MultiExprArg Args(&InitListAsExpr, InitList ? 1 : 0); | ||||
5174 | bool InitListSyntax = InitList; | ||||
5175 | |||||
5176 | // FIXME: Instead of creating a CXXConstructExpr of array type here, | ||||
5177 | // wrap a class-typed CXXConstructExpr in an ArrayInitLoopExpr. | ||||
5178 | return TryConstructorInitialization( | ||||
5179 | S, Entity, Kind, Args, T, Entity.getType(), Sequence, InitListSyntax); | ||||
5180 | } | ||||
5181 | } | ||||
5182 | |||||
5183 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||
5184 | } | ||||
5185 | |||||
5186 | /// Attempt default initialization (C++ [dcl.init]p6). | ||||
5187 | static void TryDefaultInitialization(Sema &S, | ||||
5188 | const InitializedEntity &Entity, | ||||
5189 | const InitializationKind &Kind, | ||||
5190 | InitializationSequence &Sequence) { | ||||
5191 | assert(Kind.getKind() == InitializationKind::IK_Default)(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Default) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Default" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5191, __extension__ __PRETTY_FUNCTION__)); | ||||
5192 | |||||
5193 | // C++ [dcl.init]p6: | ||||
5194 | // To default-initialize an object of type T means: | ||||
5195 | // - if T is an array type, each element is default-initialized; | ||||
5196 | QualType DestType = S.Context.getBaseElementType(Entity.getType()); | ||||
5197 | |||||
5198 | // - if T is a (possibly cv-qualified) class type (Clause 9), the default | ||||
5199 | // constructor for T is called (and the initialization is ill-formed if | ||||
5200 | // T has no accessible default constructor); | ||||
5201 | if (DestType->isRecordType() && S.getLangOpts().CPlusPlus) { | ||||
5202 | TryConstructorInitialization(S, Entity, Kind, None, DestType, | ||||
5203 | Entity.getType(), Sequence); | ||||
5204 | return; | ||||
5205 | } | ||||
5206 | |||||
5207 | // - otherwise, no initialization is performed. | ||||
5208 | |||||
5209 | // If a program calls for the default initialization of an object of | ||||
5210 | // a const-qualified type T, T shall be a class type with a user-provided | ||||
5211 | // default constructor. | ||||
5212 | if (DestType.isConstQualified() && S.getLangOpts().CPlusPlus) { | ||||
5213 | if (!maybeRecoverWithZeroInitialization(S, Sequence, Entity)) | ||||
5214 | Sequence.SetFailed(InitializationSequence::FK_DefaultInitOfConst); | ||||
5215 | return; | ||||
5216 | } | ||||
5217 | |||||
5218 | // If the destination type has a lifetime property, zero-initialize it. | ||||
5219 | if (DestType.getQualifiers().hasObjCLifetime()) { | ||||
5220 | Sequence.AddZeroInitializationStep(Entity.getType()); | ||||
5221 | return; | ||||
5222 | } | ||||
5223 | } | ||||
5224 | |||||
5225 | /// Attempt a user-defined conversion between two types (C++ [dcl.init]), | ||||
5226 | /// which enumerates all conversion functions and performs overload resolution | ||||
5227 | /// to select the best. | ||||
5228 | static void TryUserDefinedConversion(Sema &S, | ||||
5229 | QualType DestType, | ||||
5230 | const InitializationKind &Kind, | ||||
5231 | Expr *Initializer, | ||||
5232 | InitializationSequence &Sequence, | ||||
5233 | bool TopLevelOfInitList) { | ||||
5234 | assert(!DestType->isReferenceType() && "References are handled elsewhere")(static_cast <bool> (!DestType->isReferenceType() && "References are handled elsewhere") ? void (0) : __assert_fail ("!DestType->isReferenceType() && \"References are handled elsewhere\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5234, __extension__ __PRETTY_FUNCTION__)); | ||||
5235 | QualType SourceType = Initializer->getType(); | ||||
5236 | assert((DestType->isRecordType() || SourceType->isRecordType()) &&(static_cast <bool> ((DestType->isRecordType() || SourceType ->isRecordType()) && "Must have a class type to perform a user-defined conversion" ) ? void (0) : __assert_fail ("(DestType->isRecordType() || SourceType->isRecordType()) && \"Must have a class type to perform a user-defined conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5237, __extension__ __PRETTY_FUNCTION__)) | ||||
5237 | "Must have a class type to perform a user-defined conversion")(static_cast <bool> ((DestType->isRecordType() || SourceType ->isRecordType()) && "Must have a class type to perform a user-defined conversion" ) ? void (0) : __assert_fail ("(DestType->isRecordType() || SourceType->isRecordType()) && \"Must have a class type to perform a user-defined conversion\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5237, __extension__ __PRETTY_FUNCTION__)); | ||||
5238 | |||||
5239 | // Build the candidate set directly in the initialization sequence | ||||
5240 | // structure, so that it will persist if we fail. | ||||
5241 | OverloadCandidateSet &CandidateSet = Sequence.getFailedCandidateSet(); | ||||
5242 | CandidateSet.clear(OverloadCandidateSet::CSK_InitByUserDefinedConversion); | ||||
5243 | CandidateSet.setDestAS(DestType.getQualifiers().getAddressSpace()); | ||||
5244 | |||||
5245 | // Determine whether we are allowed to call explicit constructors or | ||||
5246 | // explicit conversion operators. | ||||
5247 | bool AllowExplicit = Kind.AllowExplicit(); | ||||
5248 | |||||
5249 | if (const RecordType *DestRecordType = DestType->getAs<RecordType>()) { | ||||
5250 | // The type we're converting to is a class type. Enumerate its constructors | ||||
5251 | // to see if there is a suitable conversion. | ||||
5252 | CXXRecordDecl *DestRecordDecl | ||||
5253 | = cast<CXXRecordDecl>(DestRecordType->getDecl()); | ||||
5254 | |||||
5255 | // Try to complete the type we're converting to. | ||||
5256 | if (S.isCompleteType(Kind.getLocation(), DestType)) { | ||||
5257 | for (NamedDecl *D : S.LookupConstructors(DestRecordDecl)) { | ||||
5258 | auto Info = getConstructorInfo(D); | ||||
5259 | if (!Info.Constructor) | ||||
5260 | continue; | ||||
5261 | |||||
5262 | if (!Info.Constructor->isInvalidDecl() && | ||||
5263 | Info.Constructor->isConvertingConstructor(/*AllowExplicit*/true)) { | ||||
5264 | if (Info.ConstructorTmpl) | ||||
5265 | S.AddTemplateOverloadCandidate( | ||||
5266 | Info.ConstructorTmpl, Info.FoundDecl, | ||||
5267 | /*ExplicitArgs*/ nullptr, Initializer, CandidateSet, | ||||
5268 | /*SuppressUserConversions=*/true, | ||||
5269 | /*PartialOverloading*/ false, AllowExplicit); | ||||
5270 | else | ||||
5271 | S.AddOverloadCandidate(Info.Constructor, Info.FoundDecl, | ||||
5272 | Initializer, CandidateSet, | ||||
5273 | /*SuppressUserConversions=*/true, | ||||
5274 | /*PartialOverloading*/ false, AllowExplicit); | ||||
5275 | } | ||||
5276 | } | ||||
5277 | } | ||||
5278 | } | ||||
5279 | |||||
5280 | SourceLocation DeclLoc = Initializer->getBeginLoc(); | ||||
5281 | |||||
5282 | if (const RecordType *SourceRecordType = SourceType->getAs<RecordType>()) { | ||||
5283 | // The type we're converting from is a class type, enumerate its conversion | ||||
5284 | // functions. | ||||
5285 | |||||
5286 | // We can only enumerate the conversion functions for a complete type; if | ||||
5287 | // the type isn't complete, simply skip this step. | ||||
5288 | if (S.isCompleteType(DeclLoc, SourceType)) { | ||||
5289 | CXXRecordDecl *SourceRecordDecl | ||||
5290 | = cast<CXXRecordDecl>(SourceRecordType->getDecl()); | ||||
5291 | |||||
5292 | const auto &Conversions = | ||||
5293 | SourceRecordDecl->getVisibleConversionFunctions(); | ||||
5294 | for (auto I = Conversions.begin(), E = Conversions.end(); I != E; ++I) { | ||||
5295 | NamedDecl *D = *I; | ||||
5296 | CXXRecordDecl *ActingDC = cast<CXXRecordDecl>(D->getDeclContext()); | ||||
5297 | if (isa<UsingShadowDecl>(D)) | ||||
5298 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); | ||||
5299 | |||||
5300 | FunctionTemplateDecl *ConvTemplate = dyn_cast<FunctionTemplateDecl>(D); | ||||
5301 | CXXConversionDecl *Conv; | ||||
5302 | if (ConvTemplate) | ||||
5303 | Conv = cast<CXXConversionDecl>(ConvTemplate->getTemplatedDecl()); | ||||
5304 | else | ||||
5305 | Conv = cast<CXXConversionDecl>(D); | ||||
5306 | |||||
5307 | if (ConvTemplate) | ||||
5308 | S.AddTemplateConversionCandidate( | ||||
5309 | ConvTemplate, I.getPair(), ActingDC, Initializer, DestType, | ||||
5310 | CandidateSet, AllowExplicit, AllowExplicit); | ||||
5311 | else | ||||
5312 | S.AddConversionCandidate(Conv, I.getPair(), ActingDC, Initializer, | ||||
5313 | DestType, CandidateSet, AllowExplicit, | ||||
5314 | AllowExplicit); | ||||
5315 | } | ||||
5316 | } | ||||
5317 | } | ||||
5318 | |||||
5319 | // Perform overload resolution. If it fails, return the failed result. | ||||
5320 | OverloadCandidateSet::iterator Best; | ||||
5321 | if (OverloadingResult Result | ||||
5322 | = CandidateSet.BestViableFunction(S, DeclLoc, Best)) { | ||||
5323 | Sequence.SetOverloadFailure( | ||||
5324 | InitializationSequence::FK_UserConversionOverloadFailed, Result); | ||||
5325 | |||||
5326 | // [class.copy.elision]p3: | ||||
5327 | // In some copy-initialization contexts, a two-stage overload resolution | ||||
5328 | // is performed. | ||||
5329 | // If the first overload resolution selects a deleted function, we also | ||||
5330 | // need the initialization sequence to decide whether to perform the second | ||||
5331 | // overload resolution. | ||||
5332 | if (!(Result == OR_Deleted && | ||||
5333 | Kind.getKind() == InitializationKind::IK_Copy)) | ||||
5334 | return; | ||||
5335 | } | ||||
5336 | |||||
5337 | FunctionDecl *Function = Best->Function; | ||||
5338 | Function->setReferenced(); | ||||
5339 | bool HadMultipleCandidates = (CandidateSet.size() > 1); | ||||
5340 | |||||
5341 | if (isa<CXXConstructorDecl>(Function)) { | ||||
5342 | // Add the user-defined conversion step. Any cv-qualification conversion is | ||||
5343 | // subsumed by the initialization. Per DR5, the created temporary is of the | ||||
5344 | // cv-unqualified type of the destination. | ||||
5345 | Sequence.AddUserConversionStep(Function, Best->FoundDecl, | ||||
5346 | DestType.getUnqualifiedType(), | ||||
5347 | HadMultipleCandidates); | ||||
5348 | |||||
5349 | // C++14 and before: | ||||
5350 | // - if the function is a constructor, the call initializes a temporary | ||||
5351 | // of the cv-unqualified version of the destination type. The [...] | ||||
5352 | // temporary [...] is then used to direct-initialize, according to the | ||||
5353 | // rules above, the object that is the destination of the | ||||
5354 | // copy-initialization. | ||||
5355 | // Note that this just performs a simple object copy from the temporary. | ||||
5356 | // | ||||
5357 | // C++17: | ||||
5358 | // - if the function is a constructor, the call is a prvalue of the | ||||
5359 | // cv-unqualified version of the destination type whose return object | ||||
5360 | // is initialized by the constructor. The call is used to | ||||
5361 | // direct-initialize, according to the rules above, the object that | ||||
5362 | // is the destination of the copy-initialization. | ||||
5363 | // Therefore we need to do nothing further. | ||||
5364 | // | ||||
5365 | // FIXME: Mark this copy as extraneous. | ||||
5366 | if (!S.getLangOpts().CPlusPlus17) | ||||
5367 | Sequence.AddFinalCopy(DestType); | ||||
5368 | else if (DestType.hasQualifiers()) | ||||
5369 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||
5370 | return; | ||||
5371 | } | ||||
5372 | |||||
5373 | // Add the user-defined conversion step that calls the conversion function. | ||||
5374 | QualType ConvType = Function->getCallResultType(); | ||||
5375 | Sequence.AddUserConversionStep(Function, Best->FoundDecl, ConvType, | ||||
5376 | HadMultipleCandidates); | ||||
5377 | |||||
5378 | if (ConvType->getAs<RecordType>()) { | ||||
5379 | // The call is used to direct-initialize [...] the object that is the | ||||
5380 | // destination of the copy-initialization. | ||||
5381 | // | ||||
5382 | // In C++17, this does not call a constructor if we enter /17.6.1: | ||||
5383 | // - If the initializer expression is a prvalue and the cv-unqualified | ||||
5384 | // version of the source type is the same as the class of the | ||||
5385 | // destination [... do not make an extra copy] | ||||
5386 | // | ||||
5387 | // FIXME: Mark this copy as extraneous. | ||||
5388 | if (!S.getLangOpts().CPlusPlus17 || | ||||
5389 | Function->getReturnType()->isReferenceType() || | ||||
5390 | !S.Context.hasSameUnqualifiedType(ConvType, DestType)) | ||||
5391 | Sequence.AddFinalCopy(DestType); | ||||
5392 | else if (!S.Context.hasSameType(ConvType, DestType)) | ||||
5393 | Sequence.AddQualificationConversionStep(DestType, VK_PRValue); | ||||
5394 | return; | ||||
5395 | } | ||||
5396 | |||||
5397 | // If the conversion following the call to the conversion function | ||||
5398 | // is interesting, add it as a separate step. | ||||
5399 | if (Best->FinalConversion.First || Best->FinalConversion.Second || | ||||
5400 | Best->FinalConversion.Third) { | ||||
5401 | ImplicitConversionSequence ICS; | ||||
5402 | ICS.setStandard(); | ||||
5403 | ICS.Standard = Best->FinalConversion; | ||||
5404 | Sequence.AddConversionSequenceStep(ICS, DestType, TopLevelOfInitList); | ||||
5405 | } | ||||
5406 | } | ||||
5407 | |||||
5408 | /// An egregious hack for compatibility with libstdc++-4.2: in <tr1/hashtable>, | ||||
5409 | /// a function with a pointer return type contains a 'return false;' statement. | ||||
5410 | /// In C++11, 'false' is not a null pointer, so this breaks the build of any | ||||
5411 | /// code using that header. | ||||
5412 | /// | ||||
5413 | /// Work around this by treating 'return false;' as zero-initializing the result | ||||
5414 | /// if it's used in a pointer-returning function in a system header. | ||||
5415 | static bool isLibstdcxxPointerReturnFalseHack(Sema &S, | ||||
5416 | const InitializedEntity &Entity, | ||||
5417 | const Expr *Init) { | ||||
5418 | return S.getLangOpts().CPlusPlus11 && | ||||
5419 | Entity.getKind() == InitializedEntity::EK_Result && | ||||
5420 | Entity.getType()->isPointerType() && | ||||
5421 | isa<CXXBoolLiteralExpr>(Init) && | ||||
5422 | !cast<CXXBoolLiteralExpr>(Init)->getValue() && | ||||
5423 | S.getSourceManager().isInSystemHeader(Init->getExprLoc()); | ||||
5424 | } | ||||
5425 | |||||
5426 | /// The non-zero enum values here are indexes into diagnostic alternatives. | ||||
5427 | enum InvalidICRKind { IIK_okay, IIK_nonlocal, IIK_nonscalar }; | ||||
5428 | |||||
5429 | /// Determines whether this expression is an acceptable ICR source. | ||||
5430 | static InvalidICRKind isInvalidICRSource(ASTContext &C, Expr *e, | ||||
5431 | bool isAddressOf, bool &isWeakAccess) { | ||||
5432 | // Skip parens. | ||||
5433 | e = e->IgnoreParens(); | ||||
5434 | |||||
5435 | // Skip address-of nodes. | ||||
5436 | if (UnaryOperator *op = dyn_cast<UnaryOperator>(e)) { | ||||
5437 | if (op->getOpcode() == UO_AddrOf) | ||||
5438 | return isInvalidICRSource(C, op->getSubExpr(), /*addressof*/ true, | ||||
5439 | isWeakAccess); | ||||
5440 | |||||
5441 | // Skip certain casts. | ||||
5442 | } else if (CastExpr *ce = dyn_cast<CastExpr>(e)) { | ||||
5443 | switch (ce->getCastKind()) { | ||||
5444 | case CK_Dependent: | ||||
5445 | case CK_BitCast: | ||||
5446 | case CK_LValueBitCast: | ||||
5447 | case CK_NoOp: | ||||
5448 | return isInvalidICRSource(C, ce->getSubExpr(), isAddressOf, isWeakAccess); | ||||
5449 | |||||
5450 | case CK_ArrayToPointerDecay: | ||||
5451 | return IIK_nonscalar; | ||||
5452 | |||||
5453 | case CK_NullToPointer: | ||||
5454 | return IIK_okay; | ||||
5455 | |||||
5456 | default: | ||||
5457 | break; | ||||
5458 | } | ||||
5459 | |||||
5460 | // If we have a declaration reference, it had better be a local variable. | ||||
5461 | } else if (isa<DeclRefExpr>(e)) { | ||||
5462 | // set isWeakAccess to true, to mean that there will be an implicit | ||||
5463 | // load which requires a cleanup. | ||||
5464 | if (e->getType().getObjCLifetime() == Qualifiers::OCL_Weak) | ||||
5465 | isWeakAccess = true; | ||||
5466 | |||||
5467 | if (!isAddressOf) return IIK_nonlocal; | ||||
5468 | |||||
5469 | VarDecl *var = dyn_cast<VarDecl>(cast<DeclRefExpr>(e)->getDecl()); | ||||
5470 | if (!var) return IIK_nonlocal; | ||||
5471 | |||||
5472 | return (var->hasLocalStorage() ? IIK_okay : IIK_nonlocal); | ||||
5473 | |||||
5474 | // If we have a conditional operator, check both sides. | ||||
5475 | } else if (ConditionalOperator *cond = dyn_cast<ConditionalOperator>(e)) { | ||||
5476 | if (InvalidICRKind iik = isInvalidICRSource(C, cond->getLHS(), isAddressOf, | ||||
5477 | isWeakAccess)) | ||||
5478 | return iik; | ||||
5479 | |||||
5480 | return isInvalidICRSource(C, cond->getRHS(), isAddressOf, isWeakAccess); | ||||
5481 | |||||
5482 | // These are never scalar. | ||||
5483 | } else if (isa<ArraySubscriptExpr>(e)) { | ||||
5484 | return IIK_nonscalar; | ||||
5485 | |||||
5486 | // Otherwise, it needs to be a null pointer constant. | ||||
5487 | } else { | ||||
5488 | return (e->isNullPointerConstant(C, Expr::NPC_ValueDependentIsNull) | ||||
5489 | ? IIK_okay : IIK_nonlocal); | ||||
5490 | } | ||||
5491 | |||||
5492 | return IIK_nonlocal; | ||||
5493 | } | ||||
5494 | |||||
5495 | /// Check whether the given expression is a valid operand for an | ||||
5496 | /// indirect copy/restore. | ||||
5497 | static void checkIndirectCopyRestoreSource(Sema &S, Expr *src) { | ||||
5498 | assert(src->isPRValue())(static_cast <bool> (src->isPRValue()) ? void (0) : __assert_fail ("src->isPRValue()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5498, __extension__ __PRETTY_FUNCTION__)); | ||||
5499 | bool isWeakAccess = false; | ||||
5500 | InvalidICRKind iik = isInvalidICRSource(S.Context, src, false, isWeakAccess); | ||||
5501 | // If isWeakAccess to true, there will be an implicit | ||||
5502 | // load which requires a cleanup. | ||||
5503 | if (S.getLangOpts().ObjCAutoRefCount && isWeakAccess) | ||||
5504 | S.Cleanup.setExprNeedsCleanups(true); | ||||
5505 | |||||
5506 | if (iik == IIK_okay) return; | ||||
5507 | |||||
5508 | S.Diag(src->getExprLoc(), diag::err_arc_nonlocal_writeback) | ||||
5509 | << ((unsigned) iik - 1) // shift index into diagnostic explanations | ||||
5510 | << src->getSourceRange(); | ||||
5511 | } | ||||
5512 | |||||
5513 | /// Determine whether we have compatible array types for the | ||||
5514 | /// purposes of GNU by-copy array initialization. | ||||
5515 | static bool hasCompatibleArrayTypes(ASTContext &Context, const ArrayType *Dest, | ||||
5516 | const ArrayType *Source) { | ||||
5517 | // If the source and destination array types are equivalent, we're | ||||
5518 | // done. | ||||
5519 | if (Context.hasSameType(QualType(Dest, 0), QualType(Source, 0))) | ||||
5520 | return true; | ||||
5521 | |||||
5522 | // Make sure that the element types are the same. | ||||
5523 | if (!Context.hasSameType(Dest->getElementType(), Source->getElementType())) | ||||
5524 | return false; | ||||
5525 | |||||
5526 | // The only mismatch we allow is when the destination is an | ||||
5527 | // incomplete array type and the source is a constant array type. | ||||
5528 | return Source->isConstantArrayType() && Dest->isIncompleteArrayType(); | ||||
5529 | } | ||||
5530 | |||||
5531 | static bool tryObjCWritebackConversion(Sema &S, | ||||
5532 | InitializationSequence &Sequence, | ||||
5533 | const InitializedEntity &Entity, | ||||
5534 | Expr *Initializer) { | ||||
5535 | bool ArrayDecay = false; | ||||
5536 | QualType ArgType = Initializer->getType(); | ||||
5537 | QualType ArgPointee; | ||||
5538 | if (const ArrayType *ArgArrayType = S.Context.getAsArrayType(ArgType)) { | ||||
5539 | ArrayDecay = true; | ||||
5540 | ArgPointee = ArgArrayType->getElementType(); | ||||
5541 | ArgType = S.Context.getPointerType(ArgPointee); | ||||
5542 | } | ||||
5543 | |||||
5544 | // Handle write-back conversion. | ||||
5545 | QualType ConvertedArgType; | ||||
5546 | if (!S.isObjCWritebackConversion(ArgType, Entity.getType(), | ||||
5547 | ConvertedArgType)) | ||||
5548 | return false; | ||||
5549 | |||||
5550 | // We should copy unless we're passing to an argument explicitly | ||||
5551 | // marked 'out'. | ||||
5552 | bool ShouldCopy = true; | ||||
5553 | if (ParmVarDecl *param = cast_or_null<ParmVarDecl>(Entity.getDecl())) | ||||
5554 | ShouldCopy = (param->getObjCDeclQualifier() != ParmVarDecl::OBJC_TQ_Out); | ||||
5555 | |||||
5556 | // Do we need an lvalue conversion? | ||||
5557 | if (ArrayDecay || Initializer->isGLValue()) { | ||||
5558 | ImplicitConversionSequence ICS; | ||||
5559 | ICS.setStandard(); | ||||
5560 | ICS.Standard.setAsIdentityConversion(); | ||||
5561 | |||||
5562 | QualType ResultType; | ||||
5563 | if (ArrayDecay) { | ||||
5564 | ICS.Standard.First = ICK_Array_To_Pointer; | ||||
5565 | ResultType = S.Context.getPointerType(ArgPointee); | ||||
5566 | } else { | ||||
5567 | ICS.Standard.First = ICK_Lvalue_To_Rvalue; | ||||
5568 | ResultType = Initializer->getType().getNonLValueExprType(S.Context); | ||||
5569 | } | ||||
5570 | |||||
5571 | Sequence.AddConversionSequenceStep(ICS, ResultType); | ||||
5572 | } | ||||
5573 | |||||
5574 | Sequence.AddPassByIndirectCopyRestoreStep(Entity.getType(), ShouldCopy); | ||||
5575 | return true; | ||||
5576 | } | ||||
5577 | |||||
5578 | static bool TryOCLSamplerInitialization(Sema &S, | ||||
5579 | InitializationSequence &Sequence, | ||||
5580 | QualType DestType, | ||||
5581 | Expr *Initializer) { | ||||
5582 | if (!S.getLangOpts().OpenCL || !DestType->isSamplerT() || | ||||
5583 | (!Initializer->isIntegerConstantExpr(S.Context) && | ||||
5584 | !Initializer->getType()->isSamplerT())) | ||||
5585 | return false; | ||||
5586 | |||||
5587 | Sequence.AddOCLSamplerInitStep(DestType); | ||||
5588 | return true; | ||||
5589 | } | ||||
5590 | |||||
5591 | static bool IsZeroInitializer(Expr *Initializer, Sema &S) { | ||||
5592 | return Initializer->isIntegerConstantExpr(S.getASTContext()) && | ||||
5593 | (Initializer->EvaluateKnownConstInt(S.getASTContext()) == 0); | ||||
5594 | } | ||||
5595 | |||||
5596 | static bool TryOCLZeroOpaqueTypeInitialization(Sema &S, | ||||
5597 | InitializationSequence &Sequence, | ||||
5598 | QualType DestType, | ||||
5599 | Expr *Initializer) { | ||||
5600 | if (!S.getLangOpts().OpenCL) | ||||
5601 | return false; | ||||
5602 | |||||
5603 | // | ||||
5604 | // OpenCL 1.2 spec, s6.12.10 | ||||
5605 | // | ||||
5606 | // The event argument can also be used to associate the | ||||
5607 | // async_work_group_copy with a previous async copy allowing | ||||
5608 | // an event to be shared by multiple async copies; otherwise | ||||
5609 | // event should be zero. | ||||
5610 | // | ||||
5611 | if (DestType->isEventT() || DestType->isQueueT()) { | ||||
5612 | if (!IsZeroInitializer(Initializer, S)) | ||||
5613 | return false; | ||||
5614 | |||||
5615 | Sequence.AddOCLZeroOpaqueTypeStep(DestType); | ||||
5616 | return true; | ||||
5617 | } | ||||
5618 | |||||
5619 | // We should allow zero initialization for all types defined in the | ||||
5620 | // cl_intel_device_side_avc_motion_estimation extension, except | ||||
5621 | // intel_sub_group_avc_mce_payload_t and intel_sub_group_avc_mce_result_t. | ||||
5622 | if (S.getOpenCLOptions().isAvailableOption( | ||||
5623 | "cl_intel_device_side_avc_motion_estimation", S.getLangOpts()) && | ||||
5624 | DestType->isOCLIntelSubgroupAVCType()) { | ||||
5625 | if (DestType->isOCLIntelSubgroupAVCMcePayloadType() || | ||||
5626 | DestType->isOCLIntelSubgroupAVCMceResultType()) | ||||
5627 | return false; | ||||
5628 | if (!IsZeroInitializer(Initializer, S)) | ||||
5629 | return false; | ||||
5630 | |||||
5631 | Sequence.AddOCLZeroOpaqueTypeStep(DestType); | ||||
5632 | return true; | ||||
5633 | } | ||||
5634 | |||||
5635 | return false; | ||||
5636 | } | ||||
5637 | |||||
5638 | InitializationSequence::InitializationSequence( | ||||
5639 | Sema &S, const InitializedEntity &Entity, const InitializationKind &Kind, | ||||
5640 | MultiExprArg Args, bool TopLevelOfInitList, bool TreatUnavailableAsInvalid) | ||||
5641 | : FailedOverloadResult(OR_Success), | ||||
5642 | FailedCandidateSet(Kind.getLocation(), OverloadCandidateSet::CSK_Normal) { | ||||
5643 | InitializeFrom(S, Entity, Kind, Args, TopLevelOfInitList, | ||||
5644 | TreatUnavailableAsInvalid); | ||||
5645 | } | ||||
5646 | |||||
5647 | /// Tries to get a FunctionDecl out of `E`. If it succeeds and we can take the | ||||
5648 | /// address of that function, this returns true. Otherwise, it returns false. | ||||
5649 | static bool isExprAnUnaddressableFunction(Sema &S, const Expr *E) { | ||||
5650 | auto *DRE = dyn_cast<DeclRefExpr>(E); | ||||
5651 | if (!DRE || !isa<FunctionDecl>(DRE->getDecl())) | ||||
5652 | return false; | ||||
5653 | |||||
5654 | return !S.checkAddressOfFunctionIsAvailable( | ||||
5655 | cast<FunctionDecl>(DRE->getDecl())); | ||||
5656 | } | ||||
5657 | |||||
5658 | /// Determine whether we can perform an elementwise array copy for this kind | ||||
5659 | /// of entity. | ||||
5660 | static bool canPerformArrayCopy(const InitializedEntity &Entity) { | ||||
5661 | switch (Entity.getKind()) { | ||||
5662 | case InitializedEntity::EK_LambdaCapture: | ||||
5663 | // C++ [expr.prim.lambda]p24: | ||||
5664 | // For array members, the array elements are direct-initialized in | ||||
5665 | // increasing subscript order. | ||||
5666 | return true; | ||||
5667 | |||||
5668 | case InitializedEntity::EK_Variable: | ||||
5669 | // C++ [dcl.decomp]p1: | ||||
5670 | // [...] each element is copy-initialized or direct-initialized from the | ||||
5671 | // corresponding element of the assignment-expression [...] | ||||
5672 | return isa<DecompositionDecl>(Entity.getDecl()); | ||||
5673 | |||||
5674 | case InitializedEntity::EK_Member: | ||||
5675 | // C++ [class.copy.ctor]p14: | ||||
5676 | // - if the member is an array, each element is direct-initialized with | ||||
5677 | // the corresponding subobject of x | ||||
5678 | return Entity.isImplicitMemberInitializer(); | ||||
5679 | |||||
5680 | case InitializedEntity::EK_ArrayElement: | ||||
5681 | // All the above cases are intended to apply recursively, even though none | ||||
5682 | // of them actually say that. | ||||
5683 | if (auto *E = Entity.getParent()) | ||||
5684 | return canPerformArrayCopy(*E); | ||||
5685 | break; | ||||
5686 | |||||
5687 | default: | ||||
5688 | break; | ||||
5689 | } | ||||
5690 | |||||
5691 | return false; | ||||
5692 | } | ||||
5693 | |||||
5694 | void InitializationSequence::InitializeFrom(Sema &S, | ||||
5695 | const InitializedEntity &Entity, | ||||
5696 | const InitializationKind &Kind, | ||||
5697 | MultiExprArg Args, | ||||
5698 | bool TopLevelOfInitList, | ||||
5699 | bool TreatUnavailableAsInvalid) { | ||||
5700 | ASTContext &Context = S.Context; | ||||
5701 | |||||
5702 | // Eliminate non-overload placeholder types in the arguments. We | ||||
5703 | // need to do this before checking whether types are dependent | ||||
5704 | // because lowering a pseudo-object expression might well give us | ||||
5705 | // something of dependent type. | ||||
5706 | for (unsigned I = 0, E = Args.size(); I != E; ++I) | ||||
5707 | if (Args[I]->getType()->isNonOverloadPlaceholderType()) { | ||||
5708 | // FIXME: should we be doing this here? | ||||
5709 | ExprResult result = S.CheckPlaceholderExpr(Args[I]); | ||||
5710 | if (result.isInvalid()) { | ||||
5711 | SetFailed(FK_PlaceholderType); | ||||
5712 | return; | ||||
5713 | } | ||||
5714 | Args[I] = result.get(); | ||||
5715 | } | ||||
5716 | |||||
5717 | // C++0x [dcl.init]p16: | ||||
5718 | // The semantics of initializers are as follows. The destination type is | ||||
5719 | // the type of the object or reference being initialized and the source | ||||
5720 | // type is the type of the initializer expression. The source type is not | ||||
5721 | // defined when the initializer is a braced-init-list or when it is a | ||||
5722 | // parenthesized list of expressions. | ||||
5723 | QualType DestType = Entity.getType(); | ||||
5724 | |||||
5725 | if (DestType->isDependentType() || | ||||
5726 | Expr::hasAnyTypeDependentArguments(Args)) { | ||||
5727 | SequenceKind = DependentSequence; | ||||
5728 | return; | ||||
5729 | } | ||||
5730 | |||||
5731 | // Almost everything is a normal sequence. | ||||
5732 | setSequenceKind(NormalSequence); | ||||
5733 | |||||
5734 | QualType SourceType; | ||||
5735 | Expr *Initializer = nullptr; | ||||
5736 | if (Args.size() == 1) { | ||||
5737 | Initializer = Args[0]; | ||||
5738 | if (S.getLangOpts().ObjC) { | ||||
5739 | if (S.CheckObjCBridgeRelatedConversions(Initializer->getBeginLoc(), | ||||
5740 | DestType, Initializer->getType(), | ||||
5741 | Initializer) || | ||||
5742 | S.CheckConversionToObjCLiteral(DestType, Initializer)) | ||||
5743 | Args[0] = Initializer; | ||||
5744 | } | ||||
5745 | if (!isa<InitListExpr>(Initializer)) | ||||
5746 | SourceType = Initializer->getType(); | ||||
5747 | } | ||||
5748 | |||||
5749 | // - If the initializer is a (non-parenthesized) braced-init-list, the | ||||
5750 | // object is list-initialized (8.5.4). | ||||
5751 | if (Kind.getKind() != InitializationKind::IK_Direct) { | ||||
5752 | if (InitListExpr *InitList = dyn_cast_or_null<InitListExpr>(Initializer)) { | ||||
5753 | TryListInitialization(S, Entity, Kind, InitList, *this, | ||||
5754 | TreatUnavailableAsInvalid); | ||||
5755 | return; | ||||
5756 | } | ||||
5757 | } | ||||
5758 | |||||
5759 | // - If the destination type is a reference type, see 8.5.3. | ||||
5760 | if (DestType->isReferenceType()) { | ||||
5761 | // C++0x [dcl.init.ref]p1: | ||||
5762 | // A variable declared to be a T& or T&&, that is, "reference to type T" | ||||
5763 | // (8.3.2), shall be initialized by an object, or function, of type T or | ||||
5764 | // by an object that can be converted into a T. | ||||
5765 | // (Therefore, multiple arguments are not permitted.) | ||||
5766 | if (Args.size() != 1) | ||||
5767 | SetFailed(FK_TooManyInitsForReference); | ||||
5768 | // C++17 [dcl.init.ref]p5: | ||||
5769 | // A reference [...] is initialized by an expression [...] as follows: | ||||
5770 | // If the initializer is not an expression, presumably we should reject, | ||||
5771 | // but the standard fails to actually say so. | ||||
5772 | else if (isa<InitListExpr>(Args[0])) | ||||
5773 | SetFailed(FK_ParenthesizedListInitForReference); | ||||
5774 | else | ||||
5775 | TryReferenceInitialization(S, Entity, Kind, Args[0], *this); | ||||
5776 | return; | ||||
5777 | } | ||||
5778 | |||||
5779 | // - If the initializer is (), the object is value-initialized. | ||||
5780 | if (Kind.getKind() == InitializationKind::IK_Value || | ||||
5781 | (Kind.getKind() == InitializationKind::IK_Direct && Args.empty())) { | ||||
5782 | TryValueInitialization(S, Entity, Kind, *this); | ||||
5783 | return; | ||||
5784 | } | ||||
5785 | |||||
5786 | // Handle default initialization. | ||||
5787 | if (Kind.getKind() == InitializationKind::IK_Default) { | ||||
5788 | TryDefaultInitialization(S, Entity, Kind, *this); | ||||
5789 | return; | ||||
5790 | } | ||||
5791 | |||||
5792 | // - If the destination type is an array of characters, an array of | ||||
5793 | // char16_t, an array of char32_t, or an array of wchar_t, and the | ||||
5794 | // initializer is a string literal, see 8.5.2. | ||||
5795 | // - Otherwise, if the destination type is an array, the program is | ||||
5796 | // ill-formed. | ||||
5797 | if (const ArrayType *DestAT = Context.getAsArrayType(DestType)) { | ||||
5798 | if (Initializer && isa<VariableArrayType>(DestAT)) { | ||||
5799 | SetFailed(FK_VariableLengthArrayHasInitializer); | ||||
5800 | return; | ||||
5801 | } | ||||
5802 | |||||
5803 | if (Initializer) { | ||||
5804 | switch (IsStringInit(Initializer, DestAT, Context)) { | ||||
5805 | case SIF_None: | ||||
5806 | TryStringLiteralInitialization(S, Entity, Kind, Initializer, *this); | ||||
5807 | return; | ||||
5808 | case SIF_NarrowStringIntoWideChar: | ||||
5809 | SetFailed(FK_NarrowStringIntoWideCharArray); | ||||
5810 | return; | ||||
5811 | case SIF_WideStringIntoChar: | ||||
5812 | SetFailed(FK_WideStringIntoCharArray); | ||||
5813 | return; | ||||
5814 | case SIF_IncompatWideStringIntoWideChar: | ||||
5815 | SetFailed(FK_IncompatWideStringIntoWideChar); | ||||
5816 | return; | ||||
5817 | case SIF_PlainStringIntoUTF8Char: | ||||
5818 | SetFailed(FK_PlainStringIntoUTF8Char); | ||||
5819 | return; | ||||
5820 | case SIF_UTF8StringIntoPlainChar: | ||||
5821 | SetFailed(FK_UTF8StringIntoPlainChar); | ||||
5822 | return; | ||||
5823 | case SIF_Other: | ||||
5824 | break; | ||||
5825 | } | ||||
5826 | } | ||||
5827 | |||||
5828 | // Some kinds of initialization permit an array to be initialized from | ||||
5829 | // another array of the same type, and perform elementwise initialization. | ||||
5830 | if (Initializer && isa<ConstantArrayType>(DestAT) && | ||||
5831 | S.Context.hasSameUnqualifiedType(Initializer->getType(), | ||||
5832 | Entity.getType()) && | ||||
5833 | canPerformArrayCopy(Entity)) { | ||||
5834 | // If source is a prvalue, use it directly. | ||||
5835 | if (Initializer->isPRValue()) { | ||||
5836 | AddArrayInitStep(DestType, /*IsGNUExtension*/false); | ||||
5837 | return; | ||||
5838 | } | ||||
5839 | |||||
5840 | // Emit element-at-a-time copy loop. | ||||
5841 | InitializedEntity Element = | ||||
5842 | InitializedEntity::InitializeElement(S.Context, 0, Entity); | ||||
5843 | QualType InitEltT = | ||||
5844 | Context.getAsArrayType(Initializer->getType())->getElementType(); | ||||
5845 | OpaqueValueExpr OVE(Initializer->getExprLoc(), InitEltT, | ||||
5846 | Initializer->getValueKind(), | ||||
5847 | Initializer->getObjectKind()); | ||||
5848 | Expr *OVEAsExpr = &OVE; | ||||
5849 | InitializeFrom(S, Element, Kind, OVEAsExpr, TopLevelOfInitList, | ||||
5850 | TreatUnavailableAsInvalid); | ||||
5851 | if (!Failed()) | ||||
5852 | AddArrayInitLoopStep(Entity.getType(), InitEltT); | ||||
5853 | return; | ||||
5854 | } | ||||
5855 | |||||
5856 | // Note: as an GNU C extension, we allow initialization of an | ||||
5857 | // array from a compound literal that creates an array of the same | ||||
5858 | // type, so long as the initializer has no side effects. | ||||
5859 | if (!S.getLangOpts().CPlusPlus && Initializer && | ||||
5860 | isa<CompoundLiteralExpr>(Initializer->IgnoreParens()) && | ||||
5861 | Initializer->getType()->isArrayType()) { | ||||
5862 | const ArrayType *SourceAT | ||||
5863 | = Context.getAsArrayType(Initializer->getType()); | ||||
5864 | if (!hasCompatibleArrayTypes(S.Context, DestAT, SourceAT)) | ||||
5865 | SetFailed(FK_ArrayTypeMismatch); | ||||
5866 | else if (Initializer->HasSideEffects(S.Context)) | ||||
5867 | SetFailed(FK_NonConstantArrayInit); | ||||
5868 | else { | ||||
5869 | AddArrayInitStep(DestType, /*IsGNUExtension*/true); | ||||
5870 | } | ||||
5871 | } | ||||
5872 | // Note: as a GNU C++ extension, we allow list-initialization of a | ||||
5873 | // class member of array type from a parenthesized initializer list. | ||||
5874 | else if (S.getLangOpts().CPlusPlus && | ||||
5875 | Entity.getKind() == InitializedEntity::EK_Member && | ||||
5876 | Initializer && isa<InitListExpr>(Initializer)) { | ||||
5877 | TryListInitialization(S, Entity, Kind, cast<InitListExpr>(Initializer), | ||||
5878 | *this, TreatUnavailableAsInvalid); | ||||
5879 | AddParenthesizedArrayInitStep(DestType); | ||||
5880 | } else if (DestAT->getElementType()->isCharType()) | ||||
5881 | SetFailed(FK_ArrayNeedsInitListOrStringLiteral); | ||||
5882 | else if (IsWideCharCompatible(DestAT->getElementType(), Context)) | ||||
5883 | SetFailed(FK_ArrayNeedsInitListOrWideStringLiteral); | ||||
5884 | else | ||||
5885 | SetFailed(FK_ArrayNeedsInitList); | ||||
5886 | |||||
5887 | return; | ||||
5888 | } | ||||
5889 | |||||
5890 | // Determine whether we should consider writeback conversions for | ||||
5891 | // Objective-C ARC. | ||||
5892 | bool allowObjCWritebackConversion = S.getLangOpts().ObjCAutoRefCount && | ||||
5893 | Entity.isParameterKind(); | ||||
5894 | |||||
5895 | if (TryOCLSamplerInitialization(S, *this, DestType, Initializer)) | ||||
5896 | return; | ||||
5897 | |||||
5898 | // We're at the end of the line for C: it's either a write-back conversion | ||||
5899 | // or it's a C assignment. There's no need to check anything else. | ||||
5900 | if (!S.getLangOpts().CPlusPlus) { | ||||
5901 | // If allowed, check whether this is an Objective-C writeback conversion. | ||||
5902 | if (allowObjCWritebackConversion && | ||||
5903 | tryObjCWritebackConversion(S, *this, Entity, Initializer)) { | ||||
5904 | return; | ||||
5905 | } | ||||
5906 | |||||
5907 | if (TryOCLZeroOpaqueTypeInitialization(S, *this, DestType, Initializer)) | ||||
5908 | return; | ||||
5909 | |||||
5910 | // Handle initialization in C | ||||
5911 | AddCAssignmentStep(DestType); | ||||
5912 | MaybeProduceObjCObject(S, *this, Entity); | ||||
5913 | return; | ||||
5914 | } | ||||
5915 | |||||
5916 | assert(S.getLangOpts().CPlusPlus)(static_cast <bool> (S.getLangOpts().CPlusPlus) ? void ( 0) : __assert_fail ("S.getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5916, __extension__ __PRETTY_FUNCTION__)); | ||||
5917 | |||||
5918 | // - If the destination type is a (possibly cv-qualified) class type: | ||||
5919 | if (DestType->isRecordType()) { | ||||
5920 | // - If the initialization is direct-initialization, or if it is | ||||
5921 | // copy-initialization where the cv-unqualified version of the | ||||
5922 | // source type is the same class as, or a derived class of, the | ||||
5923 | // class of the destination, constructors are considered. [...] | ||||
5924 | if (Kind.getKind() == InitializationKind::IK_Direct || | ||||
5925 | (Kind.getKind() == InitializationKind::IK_Copy && | ||||
5926 | (Context.hasSameUnqualifiedType(SourceType, DestType) || | ||||
5927 | S.IsDerivedFrom(Initializer->getBeginLoc(), SourceType, DestType)))) | ||||
5928 | TryConstructorInitialization(S, Entity, Kind, Args, | ||||
5929 | DestType, DestType, *this); | ||||
5930 | // - Otherwise (i.e., for the remaining copy-initialization cases), | ||||
5931 | // user-defined conversion sequences that can convert from the source | ||||
5932 | // type to the destination type or (when a conversion function is | ||||
5933 | // used) to a derived class thereof are enumerated as described in | ||||
5934 | // 13.3.1.4, and the best one is chosen through overload resolution | ||||
5935 | // (13.3). | ||||
5936 | else | ||||
5937 | TryUserDefinedConversion(S, DestType, Kind, Initializer, *this, | ||||
5938 | TopLevelOfInitList); | ||||
5939 | return; | ||||
5940 | } | ||||
5941 | |||||
5942 | assert(Args.size() >= 1 && "Zero-argument case handled above")(static_cast <bool> (Args.size() >= 1 && "Zero-argument case handled above" ) ? void (0) : __assert_fail ("Args.size() >= 1 && \"Zero-argument case handled above\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 5942, __extension__ __PRETTY_FUNCTION__)); | ||||
5943 | |||||
5944 | // The remaining cases all need a source type. | ||||
5945 | if (Args.size() > 1) { | ||||
5946 | SetFailed(FK_TooManyInitsForScalar); | ||||
5947 | return; | ||||
5948 | } else if (isa<InitListExpr>(Args[0])) { | ||||
5949 | SetFailed(FK_ParenthesizedListInitForScalar); | ||||
5950 | return; | ||||
5951 | } | ||||
5952 | |||||
5953 | // - Otherwise, if the source type is a (possibly cv-qualified) class | ||||
5954 | // type, conversion functions are considered. | ||||
5955 | if (!SourceType.isNull() && SourceType->isRecordType()) { | ||||
5956 | // For a conversion to _Atomic(T) from either T or a class type derived | ||||
5957 | // from T, initialize the T object then convert to _Atomic type. | ||||
5958 | bool NeedAtomicConversion = false; | ||||
5959 | if (const AtomicType *Atomic = DestType->getAs<AtomicType>()) { | ||||
5960 | if (Context.hasSameUnqualifiedType(SourceType, Atomic->getValueType()) || | ||||
5961 | S.IsDerivedFrom(Initializer->getBeginLoc(), SourceType, | ||||
5962 | Atomic->getValueType())) { | ||||
5963 | DestType = Atomic->getValueType(); | ||||
5964 | NeedAtomicConversion = true; | ||||
5965 | } | ||||
5966 | } | ||||
5967 | |||||
5968 | TryUserDefinedConversion(S, DestType, Kind, Initializer, *this, | ||||
5969 | TopLevelOfInitList); | ||||
5970 | MaybeProduceObjCObject(S, *this, Entity); | ||||
5971 | if (!Failed() && NeedAtomicConversion) | ||||
5972 | AddAtomicConversionStep(Entity.getType()); | ||||
5973 | return; | ||||
5974 | } | ||||
5975 | |||||
5976 | // - Otherwise, if the initialization is direct-initialization, the source | ||||
5977 | // type is std::nullptr_t, and the destination type is bool, the initial | ||||
5978 | // value of the object being initialized is false. | ||||
5979 | if (!SourceType.isNull() && SourceType->isNullPtrType() && | ||||
5980 | DestType->isBooleanType() && | ||||
5981 | Kind.getKind() == InitializationKind::IK_Direct) { | ||||
5982 | AddConversionSequenceStep( | ||||
5983 | ImplicitConversionSequence::getNullptrToBool(SourceType, DestType, | ||||
5984 | Initializer->isGLValue()), | ||||
5985 | DestType); | ||||
5986 | return; | ||||
5987 | } | ||||
5988 | |||||
5989 | // - Otherwise, the initial value of the object being initialized is the | ||||
5990 | // (possibly converted) value of the initializer expression. Standard | ||||
5991 | // conversions (Clause 4) will be used, if necessary, to convert the | ||||
5992 | // initializer expression to the cv-unqualified version of the | ||||
5993 | // destination type; no user-defined conversions are considered. | ||||
5994 | |||||
5995 | ImplicitConversionSequence ICS | ||||
5996 | = S.TryImplicitConversion(Initializer, DestType, | ||||
5997 | /*SuppressUserConversions*/true, | ||||
5998 | Sema::AllowedExplicit::None, | ||||
5999 | /*InOverloadResolution*/ false, | ||||
6000 | /*CStyle=*/Kind.isCStyleOrFunctionalCast(), | ||||
6001 | allowObjCWritebackConversion); | ||||
6002 | |||||
6003 | if (ICS.isStandard() && | ||||
6004 | ICS.Standard.Second == ICK_Writeback_Conversion) { | ||||
6005 | // Objective-C ARC writeback conversion. | ||||
6006 | |||||
6007 | // We should copy unless we're passing to an argument explicitly | ||||
6008 | // marked 'out'. | ||||
6009 | bool ShouldCopy = true; | ||||
6010 | if (ParmVarDecl *Param = cast_or_null<ParmVarDecl>(Entity.getDecl())) | ||||
6011 | ShouldCopy = (Param->getObjCDeclQualifier() != ParmVarDecl::OBJC_TQ_Out); | ||||
6012 | |||||
6013 | // If there was an lvalue adjustment, add it as a separate conversion. | ||||
6014 | if (ICS.Standard.First == ICK_Array_To_Pointer || | ||||
6015 | ICS.Standard.First == ICK_Lvalue_To_Rvalue) { | ||||
6016 | ImplicitConversionSequence LvalueICS; | ||||
6017 | LvalueICS.setStandard(); | ||||
6018 | LvalueICS.Standard.setAsIdentityConversion(); | ||||
6019 | LvalueICS.Standard.setAllToTypes(ICS.Standard.getToType(0)); | ||||
6020 | LvalueICS.Standard.First = ICS.Standard.First; | ||||
6021 | AddConversionSequenceStep(LvalueICS, ICS.Standard.getToType(0)); | ||||
6022 | } | ||||
6023 | |||||
6024 | AddPassByIndirectCopyRestoreStep(DestType, ShouldCopy); | ||||
6025 | } else if (ICS.isBad()) { | ||||
6026 | DeclAccessPair dap; | ||||
6027 | if (isLibstdcxxPointerReturnFalseHack(S, Entity, Initializer)) { | ||||
6028 | AddZeroInitializationStep(Entity.getType()); | ||||
6029 | } else if (Initializer->getType() == Context.OverloadTy && | ||||
6030 | !S.ResolveAddressOfOverloadedFunction(Initializer, DestType, | ||||
6031 | false, dap)) | ||||
6032 | SetFailed(InitializationSequence::FK_AddressOfOverloadFailed); | ||||
6033 | else if (Initializer->getType()->isFunctionType() && | ||||
6034 | isExprAnUnaddressableFunction(S, Initializer)) | ||||
6035 | SetFailed(InitializationSequence::FK_AddressOfUnaddressableFunction); | ||||
6036 | else | ||||
6037 | SetFailed(InitializationSequence::FK_ConversionFailed); | ||||
6038 | } else { | ||||
6039 | AddConversionSequenceStep(ICS, DestType, TopLevelOfInitList); | ||||
6040 | |||||
6041 | MaybeProduceObjCObject(S, *this, Entity); | ||||
6042 | } | ||||
6043 | } | ||||
6044 | |||||
6045 | InitializationSequence::~InitializationSequence() { | ||||
6046 | for (auto &S : Steps) | ||||
6047 | S.Destroy(); | ||||
6048 | } | ||||
6049 | |||||
6050 | //===----------------------------------------------------------------------===// | ||||
6051 | // Perform initialization | ||||
6052 | //===----------------------------------------------------------------------===// | ||||
6053 | static Sema::AssignmentAction | ||||
6054 | getAssignmentAction(const InitializedEntity &Entity, bool Diagnose = false) { | ||||
6055 | switch(Entity.getKind()) { | ||||
6056 | case InitializedEntity::EK_Variable: | ||||
6057 | case InitializedEntity::EK_New: | ||||
6058 | case InitializedEntity::EK_Exception: | ||||
6059 | case InitializedEntity::EK_Base: | ||||
6060 | case InitializedEntity::EK_Delegating: | ||||
6061 | return Sema::AA_Initializing; | ||||
6062 | |||||
6063 | case InitializedEntity::EK_Parameter: | ||||
6064 | if (Entity.getDecl() && | ||||
6065 | isa<ObjCMethodDecl>(Entity.getDecl()->getDeclContext())) | ||||
6066 | return Sema::AA_Sending; | ||||
6067 | |||||
6068 | return Sema::AA_Passing; | ||||
6069 | |||||
6070 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||
6071 | if (Entity.getDecl() && | ||||
6072 | isa<ObjCMethodDecl>(Entity.getDecl()->getDeclContext())) | ||||
6073 | return Sema::AA_Sending; | ||||
6074 | |||||
6075 | return !Diagnose ? Sema::AA_Passing : Sema::AA_Passing_CFAudited; | ||||
6076 | |||||
6077 | case InitializedEntity::EK_Result: | ||||
6078 | case InitializedEntity::EK_StmtExprResult: // FIXME: Not quite right. | ||||
6079 | return Sema::AA_Returning; | ||||
6080 | |||||
6081 | case InitializedEntity::EK_Temporary: | ||||
6082 | case InitializedEntity::EK_RelatedResult: | ||||
6083 | // FIXME: Can we tell apart casting vs. converting? | ||||
6084 | return Sema::AA_Casting; | ||||
6085 | |||||
6086 | case InitializedEntity::EK_TemplateParameter: | ||||
6087 | // This is really initialization, but refer to it as conversion for | ||||
6088 | // consistency with CheckConvertedConstantExpression. | ||||
6089 | return Sema::AA_Converting; | ||||
6090 | |||||
6091 | case InitializedEntity::EK_Member: | ||||
6092 | case InitializedEntity::EK_Binding: | ||||
6093 | case InitializedEntity::EK_ArrayElement: | ||||
6094 | case InitializedEntity::EK_VectorElement: | ||||
6095 | case InitializedEntity::EK_ComplexElement: | ||||
6096 | case InitializedEntity::EK_BlockElement: | ||||
6097 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||
6098 | case InitializedEntity::EK_LambdaCapture: | ||||
6099 | case InitializedEntity::EK_CompoundLiteralInit: | ||||
6100 | return Sema::AA_Initializing; | ||||
6101 | } | ||||
6102 | |||||
6103 | llvm_unreachable("Invalid EntityKind!")::llvm::llvm_unreachable_internal("Invalid EntityKind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6103); | ||||
6104 | } | ||||
6105 | |||||
6106 | /// Whether we should bind a created object as a temporary when | ||||
6107 | /// initializing the given entity. | ||||
6108 | static bool shouldBindAsTemporary(const InitializedEntity &Entity) { | ||||
6109 | switch (Entity.getKind()) { | ||||
6110 | case InitializedEntity::EK_ArrayElement: | ||||
6111 | case InitializedEntity::EK_Member: | ||||
6112 | case InitializedEntity::EK_Result: | ||||
6113 | case InitializedEntity::EK_StmtExprResult: | ||||
6114 | case InitializedEntity::EK_New: | ||||
6115 | case InitializedEntity::EK_Variable: | ||||
6116 | case InitializedEntity::EK_Base: | ||||
6117 | case InitializedEntity::EK_Delegating: | ||||
6118 | case InitializedEntity::EK_VectorElement: | ||||
6119 | case InitializedEntity::EK_ComplexElement: | ||||
6120 | case InitializedEntity::EK_Exception: | ||||
6121 | case InitializedEntity::EK_BlockElement: | ||||
6122 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||
6123 | case InitializedEntity::EK_LambdaCapture: | ||||
6124 | case InitializedEntity::EK_CompoundLiteralInit: | ||||
6125 | case InitializedEntity::EK_TemplateParameter: | ||||
6126 | return false; | ||||
6127 | |||||
6128 | case InitializedEntity::EK_Parameter: | ||||
6129 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||
6130 | case InitializedEntity::EK_Temporary: | ||||
6131 | case InitializedEntity::EK_RelatedResult: | ||||
6132 | case InitializedEntity::EK_Binding: | ||||
6133 | return true; | ||||
6134 | } | ||||
6135 | |||||
6136 | llvm_unreachable("missed an InitializedEntity kind?")::llvm::llvm_unreachable_internal("missed an InitializedEntity kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6136); | ||||
6137 | } | ||||
6138 | |||||
6139 | /// Whether the given entity, when initialized with an object | ||||
6140 | /// created for that initialization, requires destruction. | ||||
6141 | static bool shouldDestroyEntity(const InitializedEntity &Entity) { | ||||
6142 | switch (Entity.getKind()) { | ||||
6143 | case InitializedEntity::EK_Result: | ||||
6144 | case InitializedEntity::EK_StmtExprResult: | ||||
6145 | case InitializedEntity::EK_New: | ||||
6146 | case InitializedEntity::EK_Base: | ||||
6147 | case InitializedEntity::EK_Delegating: | ||||
6148 | case InitializedEntity::EK_VectorElement: | ||||
6149 | case InitializedEntity::EK_ComplexElement: | ||||
6150 | case InitializedEntity::EK_BlockElement: | ||||
6151 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||
6152 | case InitializedEntity::EK_LambdaCapture: | ||||
6153 | return false; | ||||
6154 | |||||
6155 | case InitializedEntity::EK_Member: | ||||
6156 | case InitializedEntity::EK_Binding: | ||||
6157 | case InitializedEntity::EK_Variable: | ||||
6158 | case InitializedEntity::EK_Parameter: | ||||
6159 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||
6160 | case InitializedEntity::EK_TemplateParameter: | ||||
6161 | case InitializedEntity::EK_Temporary: | ||||
6162 | case InitializedEntity::EK_ArrayElement: | ||||
6163 | case InitializedEntity::EK_Exception: | ||||
6164 | case InitializedEntity::EK_CompoundLiteralInit: | ||||
6165 | case InitializedEntity::EK_RelatedResult: | ||||
6166 | return true; | ||||
6167 | } | ||||
6168 | |||||
6169 | llvm_unreachable("missed an InitializedEntity kind?")::llvm::llvm_unreachable_internal("missed an InitializedEntity kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6169); | ||||
6170 | } | ||||
6171 | |||||
6172 | /// Get the location at which initialization diagnostics should appear. | ||||
6173 | static SourceLocation getInitializationLoc(const InitializedEntity &Entity, | ||||
6174 | Expr *Initializer) { | ||||
6175 | switch (Entity.getKind()) { | ||||
6176 | case InitializedEntity::EK_Result: | ||||
6177 | case InitializedEntity::EK_StmtExprResult: | ||||
6178 | return Entity.getReturnLoc(); | ||||
6179 | |||||
6180 | case InitializedEntity::EK_Exception: | ||||
6181 | return Entity.getThrowLoc(); | ||||
6182 | |||||
6183 | case InitializedEntity::EK_Variable: | ||||
6184 | case InitializedEntity::EK_Binding: | ||||
6185 | return Entity.getDecl()->getLocation(); | ||||
6186 | |||||
6187 | case InitializedEntity::EK_LambdaCapture: | ||||
6188 | return Entity.getCaptureLoc(); | ||||
6189 | |||||
6190 | case InitializedEntity::EK_ArrayElement: | ||||
6191 | case InitializedEntity::EK_Member: | ||||
6192 | case InitializedEntity::EK_Parameter: | ||||
6193 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||
6194 | case InitializedEntity::EK_TemplateParameter: | ||||
6195 | case InitializedEntity::EK_Temporary: | ||||
6196 | case InitializedEntity::EK_New: | ||||
6197 | case InitializedEntity::EK_Base: | ||||
6198 | case InitializedEntity::EK_Delegating: | ||||
6199 | case InitializedEntity::EK_VectorElement: | ||||
6200 | case InitializedEntity::EK_ComplexElement: | ||||
6201 | case InitializedEntity::EK_BlockElement: | ||||
6202 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||
6203 | case InitializedEntity::EK_CompoundLiteralInit: | ||||
6204 | case InitializedEntity::EK_RelatedResult: | ||||
6205 | return Initializer->getBeginLoc(); | ||||
6206 | } | ||||
6207 | llvm_unreachable("missed an InitializedEntity kind?")::llvm::llvm_unreachable_internal("missed an InitializedEntity kind?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6207); | ||||
6208 | } | ||||
6209 | |||||
6210 | /// Make a (potentially elidable) temporary copy of the object | ||||
6211 | /// provided by the given initializer by calling the appropriate copy | ||||
6212 | /// constructor. | ||||
6213 | /// | ||||
6214 | /// \param S The Sema object used for type-checking. | ||||
6215 | /// | ||||
6216 | /// \param T The type of the temporary object, which must either be | ||||
6217 | /// the type of the initializer expression or a superclass thereof. | ||||
6218 | /// | ||||
6219 | /// \param Entity The entity being initialized. | ||||
6220 | /// | ||||
6221 | /// \param CurInit The initializer expression. | ||||
6222 | /// | ||||
6223 | /// \param IsExtraneousCopy Whether this is an "extraneous" copy that | ||||
6224 | /// is permitted in C++03 (but not C++0x) when binding a reference to | ||||
6225 | /// an rvalue. | ||||
6226 | /// | ||||
6227 | /// \returns An expression that copies the initializer expression into | ||||
6228 | /// a temporary object, or an error expression if a copy could not be | ||||
6229 | /// created. | ||||
6230 | static ExprResult CopyObject(Sema &S, | ||||
6231 | QualType T, | ||||
6232 | const InitializedEntity &Entity, | ||||
6233 | ExprResult CurInit, | ||||
6234 | bool IsExtraneousCopy) { | ||||
6235 | if (CurInit.isInvalid()) | ||||
6236 | return CurInit; | ||||
6237 | // Determine which class type we're copying to. | ||||
6238 | Expr *CurInitExpr = (Expr *)CurInit.get(); | ||||
6239 | CXXRecordDecl *Class = nullptr; | ||||
6240 | if (const RecordType *Record = T->getAs<RecordType>()) | ||||
6241 | Class = cast<CXXRecordDecl>(Record->getDecl()); | ||||
6242 | if (!Class) | ||||
6243 | return CurInit; | ||||
6244 | |||||
6245 | SourceLocation Loc = getInitializationLoc(Entity, CurInit.get()); | ||||
6246 | |||||
6247 | // Make sure that the type we are copying is complete. | ||||
6248 | if (S.RequireCompleteType(Loc, T, diag::err_temp_copy_incomplete)) | ||||
6249 | return CurInit; | ||||
6250 | |||||
6251 | // Perform overload resolution using the class's constructors. Per | ||||
6252 | // C++11 [dcl.init]p16, second bullet for class types, this initialization | ||||
6253 | // is direct-initialization. | ||||
6254 | OverloadCandidateSet CandidateSet(Loc, OverloadCandidateSet::CSK_Normal); | ||||
6255 | DeclContext::lookup_result Ctors = S.LookupConstructors(Class); | ||||
6256 | |||||
6257 | OverloadCandidateSet::iterator Best; | ||||
6258 | switch (ResolveConstructorOverload( | ||||
6259 | S, Loc, CurInitExpr, CandidateSet, T, Ctors, Best, | ||||
6260 | /*CopyInitializing=*/false, /*AllowExplicit=*/true, | ||||
6261 | /*OnlyListConstructors=*/false, /*IsListInit=*/false, | ||||
6262 | /*SecondStepOfCopyInit=*/true)) { | ||||
6263 | case OR_Success: | ||||
6264 | break; | ||||
6265 | |||||
6266 | case OR_No_Viable_Function: | ||||
6267 | CandidateSet.NoteCandidates( | ||||
6268 | PartialDiagnosticAt( | ||||
6269 | Loc, S.PDiag(IsExtraneousCopy && !S.isSFINAEContext() | ||||
6270 | ? diag::ext_rvalue_to_reference_temp_copy_no_viable | ||||
6271 | : diag::err_temp_copy_no_viable) | ||||
6272 | << (int)Entity.getKind() << CurInitExpr->getType() | ||||
6273 | << CurInitExpr->getSourceRange()), | ||||
6274 | S, OCD_AllCandidates, CurInitExpr); | ||||
6275 | if (!IsExtraneousCopy || S.isSFINAEContext()) | ||||
6276 | return ExprError(); | ||||
6277 | return CurInit; | ||||
6278 | |||||
6279 | case OR_Ambiguous: | ||||
6280 | CandidateSet.NoteCandidates( | ||||
6281 | PartialDiagnosticAt(Loc, S.PDiag(diag::err_temp_copy_ambiguous) | ||||
6282 | << (int)Entity.getKind() | ||||
6283 | << CurInitExpr->getType() | ||||
6284 | << CurInitExpr->getSourceRange()), | ||||
6285 | S, OCD_AmbiguousCandidates, CurInitExpr); | ||||
6286 | return ExprError(); | ||||
6287 | |||||
6288 | case OR_Deleted: | ||||
6289 | S.Diag(Loc, diag::err_temp_copy_deleted) | ||||
6290 | << (int)Entity.getKind() << CurInitExpr->getType() | ||||
6291 | << CurInitExpr->getSourceRange(); | ||||
6292 | S.NoteDeletedFunction(Best->Function); | ||||
6293 | return ExprError(); | ||||
6294 | } | ||||
6295 | |||||
6296 | bool HadMultipleCandidates = CandidateSet.size() > 1; | ||||
6297 | |||||
6298 | CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Best->Function); | ||||
6299 | SmallVector<Expr*, 8> ConstructorArgs; | ||||
6300 | CurInit.get(); // Ownership transferred into MultiExprArg, below. | ||||
6301 | |||||
6302 | S.CheckConstructorAccess(Loc, Constructor, Best->FoundDecl, Entity, | ||||
6303 | IsExtraneousCopy); | ||||
6304 | |||||
6305 | if (IsExtraneousCopy) { | ||||
6306 | // If this is a totally extraneous copy for C++03 reference | ||||
6307 | // binding purposes, just return the original initialization | ||||
6308 | // expression. We don't generate an (elided) copy operation here | ||||
6309 | // because doing so would require us to pass down a flag to avoid | ||||
6310 | // infinite recursion, where each step adds another extraneous, | ||||
6311 | // elidable copy. | ||||
6312 | |||||
6313 | // Instantiate the default arguments of any extra parameters in | ||||
6314 | // the selected copy constructor, as if we were going to create a | ||||
6315 | // proper call to the copy constructor. | ||||
6316 | for (unsigned I = 1, N = Constructor->getNumParams(); I != N; ++I) { | ||||
6317 | ParmVarDecl *Parm = Constructor->getParamDecl(I); | ||||
6318 | if (S.RequireCompleteType(Loc, Parm->getType(), | ||||
6319 | diag::err_call_incomplete_argument)) | ||||
6320 | break; | ||||
6321 | |||||
6322 | // Build the default argument expression; we don't actually care | ||||
6323 | // if this succeeds or not, because this routine will complain | ||||
6324 | // if there was a problem. | ||||
6325 | S.BuildCXXDefaultArgExpr(Loc, Constructor, Parm); | ||||
6326 | } | ||||
6327 | |||||
6328 | return CurInitExpr; | ||||
6329 | } | ||||
6330 | |||||
6331 | // Determine the arguments required to actually perform the | ||||
6332 | // constructor call (we might have derived-to-base conversions, or | ||||
6333 | // the copy constructor may have default arguments). | ||||
6334 | if (S.CompleteConstructorCall(Constructor, T, CurInitExpr, Loc, | ||||
6335 | ConstructorArgs)) | ||||
6336 | return ExprError(); | ||||
6337 | |||||
6338 | // C++0x [class.copy]p32: | ||||
6339 | // When certain criteria are met, an implementation is allowed to | ||||
6340 | // omit the copy/move construction of a class object, even if the | ||||
6341 | // copy/move constructor and/or destructor for the object have | ||||
6342 | // side effects. [...] | ||||
6343 | // - when a temporary class object that has not been bound to a | ||||
6344 | // reference (12.2) would be copied/moved to a class object | ||||
6345 | // with the same cv-unqualified type, the copy/move operation | ||||
6346 | // can be omitted by constructing the temporary object | ||||
6347 | // directly into the target of the omitted copy/move | ||||
6348 | // | ||||
6349 | // Note that the other three bullets are handled elsewhere. Copy | ||||
6350 | // elision for return statements and throw expressions are handled as part | ||||
6351 | // of constructor initialization, while copy elision for exception handlers | ||||
6352 | // is handled by the run-time. | ||||
6353 | // | ||||
6354 | // FIXME: If the function parameter is not the same type as the temporary, we | ||||
6355 | // should still be able to elide the copy, but we don't have a way to | ||||
6356 | // represent in the AST how much should be elided in this case. | ||||
6357 | bool Elidable = | ||||
6358 | CurInitExpr->isTemporaryObject(S.Context, Class) && | ||||
6359 | S.Context.hasSameUnqualifiedType( | ||||
6360 | Best->Function->getParamDecl(0)->getType().getNonReferenceType(), | ||||
6361 | CurInitExpr->getType()); | ||||
6362 | |||||
6363 | // Actually perform the constructor call. | ||||
6364 | CurInit = S.BuildCXXConstructExpr(Loc, T, Best->FoundDecl, Constructor, | ||||
6365 | Elidable, | ||||
6366 | ConstructorArgs, | ||||
6367 | HadMultipleCandidates, | ||||
6368 | /*ListInit*/ false, | ||||
6369 | /*StdInitListInit*/ false, | ||||
6370 | /*ZeroInit*/ false, | ||||
6371 | CXXConstructExpr::CK_Complete, | ||||
6372 | SourceRange()); | ||||
6373 | |||||
6374 | // If we're supposed to bind temporaries, do so. | ||||
6375 | if (!CurInit.isInvalid() && shouldBindAsTemporary(Entity)) | ||||
6376 | CurInit = S.MaybeBindToTemporary(CurInit.getAs<Expr>()); | ||||
6377 | return CurInit; | ||||
6378 | } | ||||
6379 | |||||
6380 | /// Check whether elidable copy construction for binding a reference to | ||||
6381 | /// a temporary would have succeeded if we were building in C++98 mode, for | ||||
6382 | /// -Wc++98-compat. | ||||
6383 | static void CheckCXX98CompatAccessibleCopy(Sema &S, | ||||
6384 | const InitializedEntity &Entity, | ||||
6385 | Expr *CurInitExpr) { | ||||
6386 | assert(S.getLangOpts().CPlusPlus11)(static_cast <bool> (S.getLangOpts().CPlusPlus11) ? void (0) : __assert_fail ("S.getLangOpts().CPlusPlus11", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6386, __extension__ __PRETTY_FUNCTION__)); | ||||
6387 | |||||
6388 | const RecordType *Record = CurInitExpr->getType()->getAs<RecordType>(); | ||||
6389 | if (!Record) | ||||
6390 | return; | ||||
6391 | |||||
6392 | SourceLocation Loc = getInitializationLoc(Entity, CurInitExpr); | ||||
6393 | if (S.Diags.isIgnored(diag::warn_cxx98_compat_temp_copy, Loc)) | ||||
6394 | return; | ||||
6395 | |||||
6396 | // Find constructors which would have been considered. | ||||
6397 | OverloadCandidateSet CandidateSet(Loc, OverloadCandidateSet::CSK_Normal); | ||||
6398 | DeclContext::lookup_result Ctors = | ||||
6399 | S.LookupConstructors(cast<CXXRecordDecl>(Record->getDecl())); | ||||
6400 | |||||
6401 | // Perform overload resolution. | ||||
6402 | OverloadCandidateSet::iterator Best; | ||||
6403 | OverloadingResult OR = ResolveConstructorOverload( | ||||
6404 | S, Loc, CurInitExpr, CandidateSet, CurInitExpr->getType(), Ctors, Best, | ||||
6405 | /*CopyInitializing=*/false, /*AllowExplicit=*/true, | ||||
6406 | /*OnlyListConstructors=*/false, /*IsListInit=*/false, | ||||
6407 | /*SecondStepOfCopyInit=*/true); | ||||
6408 | |||||
6409 | PartialDiagnostic Diag = S.PDiag(diag::warn_cxx98_compat_temp_copy) | ||||
6410 | << OR << (int)Entity.getKind() << CurInitExpr->getType() | ||||
6411 | << CurInitExpr->getSourceRange(); | ||||
6412 | |||||
6413 | switch (OR) { | ||||
6414 | case OR_Success: | ||||
6415 | S.CheckConstructorAccess(Loc, cast<CXXConstructorDecl>(Best->Function), | ||||
6416 | Best->FoundDecl, Entity, Diag); | ||||
6417 | // FIXME: Check default arguments as far as that's possible. | ||||
6418 | break; | ||||
6419 | |||||
6420 | case OR_No_Viable_Function: | ||||
6421 | CandidateSet.NoteCandidates(PartialDiagnosticAt(Loc, Diag), S, | ||||
6422 | OCD_AllCandidates, CurInitExpr); | ||||
6423 | break; | ||||
6424 | |||||
6425 | case OR_Ambiguous: | ||||
6426 | CandidateSet.NoteCandidates(PartialDiagnosticAt(Loc, Diag), S, | ||||
6427 | OCD_AmbiguousCandidates, CurInitExpr); | ||||
6428 | break; | ||||
6429 | |||||
6430 | case OR_Deleted: | ||||
6431 | S.Diag(Loc, Diag); | ||||
6432 | S.NoteDeletedFunction(Best->Function); | ||||
6433 | break; | ||||
6434 | } | ||||
6435 | } | ||||
6436 | |||||
6437 | void InitializationSequence::PrintInitLocationNote(Sema &S, | ||||
6438 | const InitializedEntity &Entity) { | ||||
6439 | if (Entity.isParamOrTemplateParamKind() && Entity.getDecl()) { | ||||
6440 | if (Entity.getDecl()->getLocation().isInvalid()) | ||||
6441 | return; | ||||
6442 | |||||
6443 | if (Entity.getDecl()->getDeclName()) | ||||
6444 | S.Diag(Entity.getDecl()->getLocation(), diag::note_parameter_named_here) | ||||
6445 | << Entity.getDecl()->getDeclName(); | ||||
6446 | else | ||||
6447 | S.Diag(Entity.getDecl()->getLocation(), diag::note_parameter_here); | ||||
6448 | } | ||||
6449 | else if (Entity.getKind() == InitializedEntity::EK_RelatedResult && | ||||
6450 | Entity.getMethodDecl()) | ||||
6451 | S.Diag(Entity.getMethodDecl()->getLocation(), | ||||
6452 | diag::note_method_return_type_change) | ||||
6453 | << Entity.getMethodDecl()->getDeclName(); | ||||
6454 | } | ||||
6455 | |||||
6456 | /// Returns true if the parameters describe a constructor initialization of | ||||
6457 | /// an explicit temporary object, e.g. "Point(x, y)". | ||||
6458 | static bool isExplicitTemporary(const InitializedEntity &Entity, | ||||
6459 | const InitializationKind &Kind, | ||||
6460 | unsigned NumArgs) { | ||||
6461 | switch (Entity.getKind()) { | ||||
6462 | case InitializedEntity::EK_Temporary: | ||||
6463 | case InitializedEntity::EK_CompoundLiteralInit: | ||||
6464 | case InitializedEntity::EK_RelatedResult: | ||||
6465 | break; | ||||
6466 | default: | ||||
6467 | return false; | ||||
6468 | } | ||||
6469 | |||||
6470 | switch (Kind.getKind()) { | ||||
6471 | case InitializationKind::IK_DirectList: | ||||
6472 | return true; | ||||
6473 | // FIXME: Hack to work around cast weirdness. | ||||
6474 | case InitializationKind::IK_Direct: | ||||
6475 | case InitializationKind::IK_Value: | ||||
6476 | return NumArgs != 1; | ||||
6477 | default: | ||||
6478 | return false; | ||||
6479 | } | ||||
6480 | } | ||||
6481 | |||||
6482 | static ExprResult | ||||
6483 | PerformConstructorInitialization(Sema &S, | ||||
6484 | const InitializedEntity &Entity, | ||||
6485 | const InitializationKind &Kind, | ||||
6486 | MultiExprArg Args, | ||||
6487 | const InitializationSequence::Step& Step, | ||||
6488 | bool &ConstructorInitRequiresZeroInit, | ||||
6489 | bool IsListInitialization, | ||||
6490 | bool IsStdInitListInitialization, | ||||
6491 | SourceLocation LBraceLoc, | ||||
6492 | SourceLocation RBraceLoc) { | ||||
6493 | unsigned NumArgs = Args.size(); | ||||
6494 | CXXConstructorDecl *Constructor | ||||
6495 | = cast<CXXConstructorDecl>(Step.Function.Function); | ||||
6496 | bool HadMultipleCandidates = Step.Function.HadMultipleCandidates; | ||||
6497 | |||||
6498 | // Build a call to the selected constructor. | ||||
6499 | SmallVector<Expr*, 8> ConstructorArgs; | ||||
6500 | SourceLocation Loc = (Kind.isCopyInit() && Kind.getEqualLoc().isValid()) | ||||
6501 | ? Kind.getEqualLoc() | ||||
6502 | : Kind.getLocation(); | ||||
6503 | |||||
6504 | if (Kind.getKind() == InitializationKind::IK_Default) { | ||||
6505 | // Force even a trivial, implicit default constructor to be | ||||
6506 | // semantically checked. We do this explicitly because we don't build | ||||
6507 | // the definition for completely trivial constructors. | ||||
6508 | assert(Constructor->getParent() && "No parent class for constructor.")(static_cast <bool> (Constructor->getParent() && "No parent class for constructor.") ? void (0) : __assert_fail ("Constructor->getParent() && \"No parent class for constructor.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6508, __extension__ __PRETTY_FUNCTION__)); | ||||
6509 | if (Constructor->isDefaulted() && Constructor->isDefaultConstructor() && | ||||
6510 | Constructor->isTrivial() && !Constructor->isUsed(false)) { | ||||
6511 | S.runWithSufficientStackSpace(Loc, [&] { | ||||
6512 | S.DefineImplicitDefaultConstructor(Loc, Constructor); | ||||
6513 | }); | ||||
6514 | } | ||||
6515 | } | ||||
6516 | |||||
6517 | ExprResult CurInit((Expr *)nullptr); | ||||
6518 | |||||
6519 | // C++ [over.match.copy]p1: | ||||
6520 | // - When initializing a temporary to be bound to the first parameter | ||||
6521 | // of a constructor that takes a reference to possibly cv-qualified | ||||
6522 | // T as its first argument, called with a single argument in the | ||||
6523 | // context of direct-initialization, explicit conversion functions | ||||
6524 | // are also considered. | ||||
6525 | bool AllowExplicitConv = | ||||
6526 | Kind.AllowExplicit() && !Kind.isCopyInit() && Args.size() == 1 && | ||||
6527 | hasCopyOrMoveCtorParam(S.Context, | ||||
6528 | getConstructorInfo(Step.Function.FoundDecl)); | ||||
6529 | |||||
6530 | // Determine the arguments required to actually perform the constructor | ||||
6531 | // call. | ||||
6532 | if (S.CompleteConstructorCall(Constructor, Step.Type, Args, Loc, | ||||
6533 | ConstructorArgs, AllowExplicitConv, | ||||
6534 | IsListInitialization)) | ||||
6535 | return ExprError(); | ||||
6536 | |||||
6537 | if (isExplicitTemporary(Entity, Kind, NumArgs)) { | ||||
6538 | // An explicitly-constructed temporary, e.g., X(1, 2). | ||||
6539 | if (S.DiagnoseUseOfDecl(Constructor, Loc)) | ||||
6540 | return ExprError(); | ||||
6541 | |||||
6542 | TypeSourceInfo *TSInfo = Entity.getTypeSourceInfo(); | ||||
6543 | if (!TSInfo) | ||||
6544 | TSInfo = S.Context.getTrivialTypeSourceInfo(Entity.getType(), Loc); | ||||
6545 | SourceRange ParenOrBraceRange = | ||||
6546 | (Kind.getKind() == InitializationKind::IK_DirectList) | ||||
6547 | ? SourceRange(LBraceLoc, RBraceLoc) | ||||
6548 | : Kind.getParenOrBraceRange(); | ||||
6549 | |||||
6550 | CXXConstructorDecl *CalleeDecl = Constructor; | ||||
6551 | if (auto *Shadow = dyn_cast<ConstructorUsingShadowDecl>( | ||||
6552 | Step.Function.FoundDecl.getDecl())) { | ||||
6553 | CalleeDecl = S.findInheritingConstructor(Loc, Constructor, Shadow); | ||||
6554 | if (S.DiagnoseUseOfDecl(CalleeDecl, Loc)) | ||||
6555 | return ExprError(); | ||||
6556 | } | ||||
6557 | S.MarkFunctionReferenced(Loc, CalleeDecl); | ||||
6558 | |||||
6559 | CurInit = S.CheckForImmediateInvocation( | ||||
6560 | CXXTemporaryObjectExpr::Create( | ||||
6561 | S.Context, CalleeDecl, | ||||
6562 | Entity.getType().getNonLValueExprType(S.Context), TSInfo, | ||||
6563 | ConstructorArgs, ParenOrBraceRange, HadMultipleCandidates, | ||||
6564 | IsListInitialization, IsStdInitListInitialization, | ||||
6565 | ConstructorInitRequiresZeroInit), | ||||
6566 | CalleeDecl); | ||||
6567 | } else { | ||||
6568 | CXXConstructExpr::ConstructionKind ConstructKind = | ||||
6569 | CXXConstructExpr::CK_Complete; | ||||
6570 | |||||
6571 | if (Entity.getKind() == InitializedEntity::EK_Base) { | ||||
6572 | ConstructKind = Entity.getBaseSpecifier()->isVirtual() ? | ||||
6573 | CXXConstructExpr::CK_VirtualBase : | ||||
6574 | CXXConstructExpr::CK_NonVirtualBase; | ||||
6575 | } else if (Entity.getKind() == InitializedEntity::EK_Delegating) { | ||||
6576 | ConstructKind = CXXConstructExpr::CK_Delegating; | ||||
6577 | } | ||||
6578 | |||||
6579 | // Only get the parenthesis or brace range if it is a list initialization or | ||||
6580 | // direct construction. | ||||
6581 | SourceRange ParenOrBraceRange; | ||||
6582 | if (IsListInitialization) | ||||
6583 | ParenOrBraceRange = SourceRange(LBraceLoc, RBraceLoc); | ||||
6584 | else if (Kind.getKind() == InitializationKind::IK_Direct) | ||||
6585 | ParenOrBraceRange = Kind.getParenOrBraceRange(); | ||||
6586 | |||||
6587 | // If the entity allows NRVO, mark the construction as elidable | ||||
6588 | // unconditionally. | ||||
6589 | if (Entity.allowsNRVO()) | ||||
6590 | CurInit = S.BuildCXXConstructExpr(Loc, Step.Type, | ||||
6591 | Step.Function.FoundDecl, | ||||
6592 | Constructor, /*Elidable=*/true, | ||||
6593 | ConstructorArgs, | ||||
6594 | HadMultipleCandidates, | ||||
6595 | IsListInitialization, | ||||
6596 | IsStdInitListInitialization, | ||||
6597 | ConstructorInitRequiresZeroInit, | ||||
6598 | ConstructKind, | ||||
6599 | ParenOrBraceRange); | ||||
6600 | else | ||||
6601 | CurInit = S.BuildCXXConstructExpr(Loc, Step.Type, | ||||
6602 | Step.Function.FoundDecl, | ||||
6603 | Constructor, | ||||
6604 | ConstructorArgs, | ||||
6605 | HadMultipleCandidates, | ||||
6606 | IsListInitialization, | ||||
6607 | IsStdInitListInitialization, | ||||
6608 | ConstructorInitRequiresZeroInit, | ||||
6609 | ConstructKind, | ||||
6610 | ParenOrBraceRange); | ||||
6611 | } | ||||
6612 | if (CurInit.isInvalid()) | ||||
6613 | return ExprError(); | ||||
6614 | |||||
6615 | // Only check access if all of that succeeded. | ||||
6616 | S.CheckConstructorAccess(Loc, Constructor, Step.Function.FoundDecl, Entity); | ||||
6617 | if (S.DiagnoseUseOfDecl(Step.Function.FoundDecl, Loc)) | ||||
6618 | return ExprError(); | ||||
6619 | |||||
6620 | if (const ArrayType *AT = S.Context.getAsArrayType(Entity.getType())) | ||||
6621 | if (checkDestructorReference(S.Context.getBaseElementType(AT), Loc, S)) | ||||
6622 | return ExprError(); | ||||
6623 | |||||
6624 | if (shouldBindAsTemporary(Entity)) | ||||
6625 | CurInit = S.MaybeBindToTemporary(CurInit.get()); | ||||
6626 | |||||
6627 | return CurInit; | ||||
6628 | } | ||||
6629 | |||||
6630 | namespace { | ||||
6631 | enum LifetimeKind { | ||||
6632 | /// The lifetime of a temporary bound to this entity ends at the end of the | ||||
6633 | /// full-expression, and that's (probably) fine. | ||||
6634 | LK_FullExpression, | ||||
6635 | |||||
6636 | /// The lifetime of a temporary bound to this entity is extended to the | ||||
6637 | /// lifeitme of the entity itself. | ||||
6638 | LK_Extended, | ||||
6639 | |||||
6640 | /// The lifetime of a temporary bound to this entity probably ends too soon, | ||||
6641 | /// because the entity is allocated in a new-expression. | ||||
6642 | LK_New, | ||||
6643 | |||||
6644 | /// The lifetime of a temporary bound to this entity ends too soon, because | ||||
6645 | /// the entity is a return object. | ||||
6646 | LK_Return, | ||||
6647 | |||||
6648 | /// The lifetime of a temporary bound to this entity ends too soon, because | ||||
6649 | /// the entity is the result of a statement expression. | ||||
6650 | LK_StmtExprResult, | ||||
6651 | |||||
6652 | /// This is a mem-initializer: if it would extend a temporary (other than via | ||||
6653 | /// a default member initializer), the program is ill-formed. | ||||
6654 | LK_MemInitializer, | ||||
6655 | }; | ||||
6656 | using LifetimeResult = | ||||
6657 | llvm::PointerIntPair<const InitializedEntity *, 3, LifetimeKind>; | ||||
6658 | } | ||||
6659 | |||||
6660 | /// Determine the declaration which an initialized entity ultimately refers to, | ||||
6661 | /// for the purpose of lifetime-extending a temporary bound to a reference in | ||||
6662 | /// the initialization of \p Entity. | ||||
6663 | static LifetimeResult getEntityLifetime( | ||||
6664 | const InitializedEntity *Entity, | ||||
6665 | const InitializedEntity *InitField = nullptr) { | ||||
6666 | // C++11 [class.temporary]p5: | ||||
6667 | switch (Entity->getKind()) { | ||||
6668 | case InitializedEntity::EK_Variable: | ||||
6669 | // The temporary [...] persists for the lifetime of the reference | ||||
6670 | return {Entity, LK_Extended}; | ||||
6671 | |||||
6672 | case InitializedEntity::EK_Member: | ||||
6673 | // For subobjects, we look at the complete object. | ||||
6674 | if (Entity->getParent()) | ||||
6675 | return getEntityLifetime(Entity->getParent(), Entity); | ||||
6676 | |||||
6677 | // except: | ||||
6678 | // C++17 [class.base.init]p8: | ||||
6679 | // A temporary expression bound to a reference member in a | ||||
6680 | // mem-initializer is ill-formed. | ||||
6681 | // C++17 [class.base.init]p11: | ||||
6682 | // A temporary expression bound to a reference member from a | ||||
6683 | // default member initializer is ill-formed. | ||||
6684 | // | ||||
6685 | // The context of p11 and its example suggest that it's only the use of a | ||||
6686 | // default member initializer from a constructor that makes the program | ||||
6687 | // ill-formed, not its mere existence, and that it can even be used by | ||||
6688 | // aggregate initialization. | ||||
6689 | return {Entity, Entity->isDefaultMemberInitializer() ? LK_Extended | ||||
6690 | : LK_MemInitializer}; | ||||
6691 | |||||
6692 | case InitializedEntity::EK_Binding: | ||||
6693 | // Per [dcl.decomp]p3, the binding is treated as a variable of reference | ||||
6694 | // type. | ||||
6695 | return {Entity, LK_Extended}; | ||||
6696 | |||||
6697 | case InitializedEntity::EK_Parameter: | ||||
6698 | case InitializedEntity::EK_Parameter_CF_Audited: | ||||
6699 | // -- A temporary bound to a reference parameter in a function call | ||||
6700 | // persists until the completion of the full-expression containing | ||||
6701 | // the call. | ||||
6702 | return {nullptr, LK_FullExpression}; | ||||
6703 | |||||
6704 | case InitializedEntity::EK_TemplateParameter: | ||||
6705 | // FIXME: This will always be ill-formed; should we eagerly diagnose it here? | ||||
6706 | return {nullptr, LK_FullExpression}; | ||||
6707 | |||||
6708 | case InitializedEntity::EK_Result: | ||||
6709 | // -- The lifetime of a temporary bound to the returned value in a | ||||
6710 | // function return statement is not extended; the temporary is | ||||
6711 | // destroyed at the end of the full-expression in the return statement. | ||||
6712 | return {nullptr, LK_Return}; | ||||
6713 | |||||
6714 | case InitializedEntity::EK_StmtExprResult: | ||||
6715 | // FIXME: Should we lifetime-extend through the result of a statement | ||||
6716 | // expression? | ||||
6717 | return {nullptr, LK_StmtExprResult}; | ||||
6718 | |||||
6719 | case InitializedEntity::EK_New: | ||||
6720 | // -- A temporary bound to a reference in a new-initializer persists | ||||
6721 | // until the completion of the full-expression containing the | ||||
6722 | // new-initializer. | ||||
6723 | return {nullptr, LK_New}; | ||||
6724 | |||||
6725 | case InitializedEntity::EK_Temporary: | ||||
6726 | case InitializedEntity::EK_CompoundLiteralInit: | ||||
6727 | case InitializedEntity::EK_RelatedResult: | ||||
6728 | // We don't yet know the storage duration of the surrounding temporary. | ||||
6729 | // Assume it's got full-expression duration for now, it will patch up our | ||||
6730 | // storage duration if that's not correct. | ||||
6731 | return {nullptr, LK_FullExpression}; | ||||
6732 | |||||
6733 | case InitializedEntity::EK_ArrayElement: | ||||
6734 | // For subobjects, we look at the complete object. | ||||
6735 | return getEntityLifetime(Entity->getParent(), InitField); | ||||
6736 | |||||
6737 | case InitializedEntity::EK_Base: | ||||
6738 | // For subobjects, we look at the complete object. | ||||
6739 | if (Entity->getParent()) | ||||
6740 | return getEntityLifetime(Entity->getParent(), InitField); | ||||
6741 | return {InitField, LK_MemInitializer}; | ||||
6742 | |||||
6743 | case InitializedEntity::EK_Delegating: | ||||
6744 | // We can reach this case for aggregate initialization in a constructor: | ||||
6745 | // struct A { int &&r; }; | ||||
6746 | // struct B : A { B() : A{0} {} }; | ||||
6747 | // In this case, use the outermost field decl as the context. | ||||
6748 | return {InitField, LK_MemInitializer}; | ||||
6749 | |||||
6750 | case InitializedEntity::EK_BlockElement: | ||||
6751 | case InitializedEntity::EK_LambdaToBlockConversionBlockElement: | ||||
6752 | case InitializedEntity::EK_LambdaCapture: | ||||
6753 | case InitializedEntity::EK_VectorElement: | ||||
6754 | case InitializedEntity::EK_ComplexElement: | ||||
6755 | return {nullptr, LK_FullExpression}; | ||||
6756 | |||||
6757 | case InitializedEntity::EK_Exception: | ||||
6758 | // FIXME: Can we diagnose lifetime problems with exceptions? | ||||
6759 | return {nullptr, LK_FullExpression}; | ||||
6760 | } | ||||
6761 | llvm_unreachable("unknown entity kind")::llvm::llvm_unreachable_internal("unknown entity kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 6761); | ||||
6762 | } | ||||
6763 | |||||
6764 | namespace { | ||||
6765 | enum ReferenceKind { | ||||
6766 | /// Lifetime would be extended by a reference binding to a temporary. | ||||
6767 | RK_ReferenceBinding, | ||||
6768 | /// Lifetime would be extended by a std::initializer_list object binding to | ||||
6769 | /// its backing array. | ||||
6770 | RK_StdInitializerList, | ||||
6771 | }; | ||||
6772 | |||||
6773 | /// A temporary or local variable. This will be one of: | ||||
6774 | /// * A MaterializeTemporaryExpr. | ||||
6775 | /// * A DeclRefExpr whose declaration is a local. | ||||
6776 | /// * An AddrLabelExpr. | ||||
6777 | /// * A BlockExpr for a block with captures. | ||||
6778 | using Local = Expr*; | ||||
6779 | |||||
6780 | /// Expressions we stepped over when looking for the local state. Any steps | ||||
6781 | /// that would inhibit lifetime extension or take us out of subexpressions of | ||||
6782 | /// the initializer are included. | ||||
6783 | struct IndirectLocalPathEntry { | ||||
6784 | enum EntryKind { | ||||
6785 | DefaultInit, | ||||
6786 | AddressOf, | ||||
6787 | VarInit, | ||||
6788 | LValToRVal, | ||||
6789 | LifetimeBoundCall, | ||||
6790 | TemporaryCopy, | ||||
6791 | LambdaCaptureInit, | ||||
6792 | GslReferenceInit, | ||||
6793 | GslPointerInit | ||||
6794 | } Kind; | ||||
6795 | Expr *E; | ||||
6796 | union { | ||||
6797 | const Decl *D = nullptr; | ||||
6798 | const LambdaCapture *Capture; | ||||
6799 | }; | ||||
6800 | IndirectLocalPathEntry() {} | ||||
6801 | IndirectLocalPathEntry(EntryKind K, Expr *E) : Kind(K), E(E) {} | ||||
6802 | IndirectLocalPathEntry(EntryKind K, Expr *E, const Decl *D) | ||||
6803 | : Kind(K), E(E), D(D) {} | ||||
6804 | IndirectLocalPathEntry(EntryKind K, Expr *E, const LambdaCapture *Capture) | ||||
6805 | : Kind(K), E(E), Capture(Capture) {} | ||||
6806 | }; | ||||
6807 | |||||
6808 | using IndirectLocalPath = llvm::SmallVectorImpl<IndirectLocalPathEntry>; | ||||
6809 | |||||
6810 | struct RevertToOldSizeRAII { | ||||
6811 | IndirectLocalPath &Path; | ||||
6812 | unsigned OldSize = Path.size(); | ||||
6813 | RevertToOldSizeRAII(IndirectLocalPath &Path) : Path(Path) {} | ||||
6814 | ~RevertToOldSizeRAII() { Path.resize(OldSize); } | ||||
6815 | }; | ||||
6816 | |||||
6817 | using LocalVisitor = llvm::function_ref<bool(IndirectLocalPath &Path, Local L, | ||||
6818 | ReferenceKind RK)>; | ||||
6819 | } | ||||
6820 | |||||
6821 | static bool isVarOnPath(IndirectLocalPath &Path, VarDecl *VD) { | ||||
6822 | for (auto E : Path) | ||||
6823 | if (E.Kind == IndirectLocalPathEntry::VarInit && E.D == VD) | ||||
6824 | return true; | ||||
6825 | return false; | ||||
6826 | } | ||||
6827 | |||||
6828 | static bool pathContainsInit(IndirectLocalPath &Path) { | ||||
6829 | return llvm::any_of(Path, [=](IndirectLocalPathEntry E) { | ||||
6830 | return E.Kind == IndirectLocalPathEntry::DefaultInit || | ||||
6831 | E.Kind == IndirectLocalPathEntry::VarInit; | ||||
6832 | }); | ||||
6833 | } | ||||
6834 | |||||
6835 | static void visitLocalsRetainedByInitializer(IndirectLocalPath &Path, | ||||
6836 | Expr *Init, LocalVisitor Visit, | ||||
6837 | bool RevisitSubinits, | ||||
6838 | bool EnableLifetimeWarnings); | ||||
6839 | |||||
6840 | static void visitLocalsRetainedByReferenceBinding(IndirectLocalPath &Path, | ||||
6841 | Expr *Init, ReferenceKind RK, | ||||
6842 | LocalVisitor Visit, | ||||
6843 | bool EnableLifetimeWarnings); | ||||
6844 | |||||
6845 | template <typename T> static bool isRecordWithAttr(QualType Type) { | ||||
6846 | if (auto *RD = Type->getAsCXXRecordDecl()) | ||||
6847 | return RD->hasAttr<T>(); | ||||
6848 | return false; | ||||
6849 | } | ||||
6850 | |||||
6851 | // Decl::isInStdNamespace will return false for iterators in some STL | ||||
6852 | // implementations due to them being defined in a namespace outside of the std | ||||
6853 | // namespace. | ||||
6854 | static bool isInStlNamespace(const Decl *D) { | ||||
6855 | const DeclContext *DC = D->getDeclContext(); | ||||
6856 | if (!DC) | ||||
6857 | return false; | ||||
6858 | if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) | ||||
6859 | if (const IdentifierInfo *II = ND->getIdentifier()) { | ||||
6860 | StringRef Name = II->getName(); | ||||
6861 | if (Name.size() >= 2 && Name.front() == '_' && | ||||
6862 | (Name[1] == '_' || isUppercase(Name[1]))) | ||||
6863 | return true; | ||||
6864 | } | ||||
6865 | |||||
6866 | return DC->isStdNamespace(); | ||||
6867 | } | ||||
6868 | |||||
6869 | static bool shouldTrackImplicitObjectArg(const CXXMethodDecl *Callee) { | ||||
6870 | if (auto *Conv = dyn_cast_or_null<CXXConversionDecl>(Callee)) | ||||
6871 | if (isRecordWithAttr<PointerAttr>(Conv->getConversionType())) | ||||
6872 | return true; | ||||
6873 | if (!isInStlNamespace(Callee->getParent())) | ||||
6874 | return false; | ||||
6875 | if (!isRecordWithAttr<PointerAttr>(Callee->getThisObjectType()) && | ||||
6876 | !isRecordWithAttr<OwnerAttr>(Callee->getThisObjectType())) | ||||
6877 | return false; | ||||
6878 | if (Callee->getReturnType()->isPointerType() || | ||||
6879 | isRecordWithAttr<PointerAttr>(Callee->getReturnType())) { | ||||
6880 | if (!Callee->getIdentifier()) | ||||
6881 | return false; | ||||
6882 | return llvm::StringSwitch<bool>(Callee->getName()) | ||||
6883 | .Cases("begin", "rbegin", "cbegin", "crbegin", true) | ||||
6884 | .Cases("end", "rend", "cend", "crend", true) | ||||
6885 | .Cases("c_str", "data", "get", true) | ||||
6886 | // Map and set types. | ||||
6887 | .Cases("find", "equal_range", "lower_bound", "upper_bound", true) | ||||
6888 | .Default(false); | ||||
6889 | } else if (Callee->getReturnType()->isReferenceType()) { | ||||
6890 | if (!Callee->getIdentifier()) { | ||||
6891 | auto OO = Callee->getOverloadedOperator(); | ||||
6892 | return OO == OverloadedOperatorKind::OO_Subscript || | ||||
6893 | OO == OverloadedOperatorKind::OO_Star; | ||||
6894 | } | ||||
6895 | return llvm::StringSwitch<bool>(Callee->getName()) | ||||
6896 | .Cases("front", "back", "at", "top", "value", true) | ||||
6897 | .Default(false); | ||||
6898 | } | ||||
6899 | return false; | ||||
6900 | } | ||||
6901 | |||||
6902 | static bool shouldTrackFirstArgument(const FunctionDecl *FD) { | ||||
6903 | if (!FD->getIdentifier() || FD->getNumParams() != 1) | ||||
6904 | return false; | ||||
6905 | const auto *RD = FD->getParamDecl(0)->getType()->getPointeeCXXRecordDecl(); | ||||
6906 | if (!FD->isInStdNamespace() || !RD || !RD->isInStdNamespace()) | ||||
6907 | return false; | ||||
6908 | if (!isRecordWithAttr<PointerAttr>(QualType(RD->getTypeForDecl(), 0)) && | ||||
6909 | !isRecordWithAttr<OwnerAttr>(QualType(RD->getTypeForDecl(), 0))) | ||||
6910 | return false; | ||||
6911 | if (FD->getReturnType()->isPointerType() || | ||||
6912 | isRecordWithAttr<PointerAttr>(FD->getReturnType())) { | ||||
6913 | return llvm::StringSwitch<bool>(FD->getName()) | ||||
6914 | .Cases("begin", "rbegin", "cbegin", "crbegin", true) | ||||
6915 | .Cases("end", "rend", "cend", "crend", true) | ||||
6916 | .Case("data", true) | ||||
6917 | .Default(false); | ||||
6918 | } else if (FD->getReturnType()->isReferenceType()) { | ||||
6919 | return llvm::StringSwitch<bool>(FD->getName()) | ||||
6920 | .Cases("get", "any_cast", true) | ||||
6921 | .Default(false); | ||||
6922 | } | ||||
6923 | return false; | ||||
6924 | } | ||||
6925 | |||||
6926 | static void handleGslAnnotatedTypes(IndirectLocalPath &Path, Expr *Call, | ||||
6927 | LocalVisitor Visit) { | ||||
6928 | auto VisitPointerArg = [&](const Decl *D, Expr *Arg, bool Value) { | ||||
6929 | // We are not interested in the temporary base objects of gsl Pointers: | ||||
6930 | // Temp().ptr; // Here ptr might not dangle. | ||||
6931 | if (isa<MemberExpr>(Arg->IgnoreImpCasts())) | ||||
6932 | return; | ||||
6933 | // Once we initialized a value with a reference, it can no longer dangle. | ||||
6934 | if (!Value) { | ||||
6935 | for (auto It = Path.rbegin(), End = Path.rend(); It != End; ++It) { | ||||
6936 | if (It->Kind == IndirectLocalPathEntry::GslReferenceInit) | ||||
6937 | continue; | ||||
6938 | if (It->Kind == IndirectLocalPathEntry::GslPointerInit) | ||||
6939 | return; | ||||
6940 | break; | ||||
6941 | } | ||||
6942 | } | ||||
6943 | Path.push_back({Value ? IndirectLocalPathEntry::GslPointerInit | ||||
6944 | : IndirectLocalPathEntry::GslReferenceInit, | ||||
6945 | Arg, D}); | ||||
6946 | if (Arg->isGLValue()) | ||||
6947 | visitLocalsRetainedByReferenceBinding(Path, Arg, RK_ReferenceBinding, | ||||
6948 | Visit, | ||||
6949 | /*EnableLifetimeWarnings=*/true); | ||||
6950 | else | ||||
6951 | visitLocalsRetainedByInitializer(Path, Arg, Visit, true, | ||||
6952 | /*EnableLifetimeWarnings=*/true); | ||||
6953 | Path.pop_back(); | ||||
6954 | }; | ||||
6955 | |||||
6956 | if (auto *MCE = dyn_cast<CXXMemberCallExpr>(Call)) { | ||||
6957 | const auto *MD = cast_or_null<CXXMethodDecl>(MCE->getDirectCallee()); | ||||
6958 | if (MD && shouldTrackImplicitObjectArg(MD)) | ||||
6959 | VisitPointerArg(MD, MCE->getImplicitObjectArgument(), | ||||
6960 | !MD->getReturnType()->isReferenceType()); | ||||
6961 | return; | ||||
6962 | } else if (auto *OCE = dyn_cast<CXXOperatorCallExpr>(Call)) { | ||||
6963 | FunctionDecl *Callee = OCE->getDirectCallee(); | ||||
6964 | if (Callee && Callee->isCXXInstanceMember() && | ||||
6965 | shouldTrackImplicitObjectArg(cast<CXXMethodDecl>(Callee))) | ||||
6966 | VisitPointerArg(Callee, OCE->getArg(0), | ||||
6967 | !Callee->getReturnType()->isReferenceType()); | ||||
6968 | return; | ||||
6969 | } else if (auto *CE = dyn_cast<CallExpr>(Call)) { | ||||
6970 | FunctionDecl *Callee = CE->getDirectCallee(); | ||||
6971 | if (Callee && shouldTrackFirstArgument(Callee)) | ||||
6972 | VisitPointerArg(Callee, CE->getArg(0), | ||||
6973 | !Callee->getReturnType()->isReferenceType()); | ||||
6974 | return; | ||||
6975 | } | ||||
6976 | |||||
6977 | if (auto *CCE = dyn_cast<CXXConstructExpr>(Call)) { | ||||
6978 | const auto *Ctor = CCE->getConstructor(); | ||||
6979 | const CXXRecordDecl *RD = Ctor->getParent(); | ||||
6980 | if (CCE->getNumArgs() > 0 && RD->hasAttr<PointerAttr>()) | ||||
6981 | VisitPointerArg(Ctor->getParamDecl(0), CCE->getArgs()[0], true); | ||||
6982 | } | ||||
6983 | } | ||||
6984 | |||||
6985 | static bool implicitObjectParamIsLifetimeBound(const FunctionDecl *FD) { | ||||
6986 | const TypeSourceInfo *TSI = FD->getTypeSourceInfo(); | ||||
6987 | if (!TSI) | ||||
6988 | return false; | ||||
6989 | // Don't declare this variable in the second operand of the for-statement; | ||||
6990 | // GCC miscompiles that by ending its lifetime before evaluating the | ||||
6991 | // third operand. See gcc.gnu.org/PR86769. | ||||
6992 | AttributedTypeLoc ATL; | ||||
6993 | for (TypeLoc TL = TSI->getTypeLoc(); | ||||
6994 | (ATL = TL.getAsAdjusted<AttributedTypeLoc>()); | ||||
6995 | TL = ATL.getModifiedLoc()) { | ||||
6996 | if (ATL.getAttrAs<LifetimeBoundAttr>()) | ||||
6997 | return true; | ||||
6998 | } | ||||
6999 | |||||
7000 | // Assume that all assignment operators with a "normal" return type return | ||||
7001 | // *this, that is, an lvalue reference that is the same type as the implicit | ||||
7002 | // object parameter (or the LHS for a non-member operator$=). | ||||
7003 | OverloadedOperatorKind OO = FD->getDeclName().getCXXOverloadedOperator(); | ||||
7004 | if (OO == OO_Equal || isCompoundAssignmentOperator(OO)) { | ||||
7005 | QualType RetT = FD->getReturnType(); | ||||
7006 | if (RetT->isLValueReferenceType()) { | ||||
7007 | ASTContext &Ctx = FD->getASTContext(); | ||||
7008 | QualType LHST; | ||||
7009 | auto *MD = dyn_cast<CXXMethodDecl>(FD); | ||||
7010 | if (MD && MD->isCXXInstanceMember()) | ||||
7011 | LHST = Ctx.getLValueReferenceType(MD->getThisObjectType()); | ||||
7012 | else | ||||
7013 | LHST = MD->getParamDecl(0)->getType(); | ||||
7014 | if (Ctx.hasSameType(RetT, LHST)) | ||||
7015 | return true; | ||||
7016 | } | ||||
7017 | } | ||||
7018 | |||||
7019 | return false; | ||||
7020 | } | ||||
7021 | |||||
7022 | static void visitLifetimeBoundArguments(IndirectLocalPath &Path, Expr *Call, | ||||
7023 | LocalVisitor Visit) { | ||||
7024 | const FunctionDecl *Callee; | ||||
7025 | ArrayRef<Expr*> Args; | ||||
7026 | |||||
7027 | if (auto *CE = dyn_cast<CallExpr>(Call)) { | ||||
7028 | Callee = CE->getDirectCallee(); | ||||
7029 | Args = llvm::makeArrayRef(CE->getArgs(), CE->getNumArgs()); | ||||
7030 | } else { | ||||
7031 | auto *CCE = cast<CXXConstructExpr>(Call); | ||||
7032 | Callee = CCE->getConstructor(); | ||||
7033 | Args = llvm::makeArrayRef(CCE->getArgs(), CCE->getNumArgs()); | ||||
7034 | } | ||||
7035 | if (!Callee) | ||||
7036 | return; | ||||
7037 | |||||
7038 | Expr *ObjectArg = nullptr; | ||||
7039 | if (isa<CXXOperatorCallExpr>(Call) && Callee->isCXXInstanceMember()) { | ||||
7040 | ObjectArg = Args[0]; | ||||
7041 | Args = Args.slice(1); | ||||
7042 | } else if (auto *MCE = dyn_cast<CXXMemberCallExpr>(Call)) { | ||||
7043 | ObjectArg = MCE->getImplicitObjectArgument(); | ||||
7044 | } | ||||
7045 | |||||
7046 | auto VisitLifetimeBoundArg = [&](const Decl *D, Expr *Arg) { | ||||
7047 | Path.push_back({IndirectLocalPathEntry::LifetimeBoundCall, Arg, D}); | ||||
7048 | if (Arg->isGLValue()) | ||||
7049 | visitLocalsRetainedByReferenceBinding(Path, Arg, RK_ReferenceBinding, | ||||
7050 | Visit, | ||||
7051 | /*EnableLifetimeWarnings=*/false); | ||||
7052 | else | ||||
7053 | visitLocalsRetainedByInitializer(Path, Arg, Visit, true, | ||||
7054 | /*EnableLifetimeWarnings=*/false); | ||||
7055 | Path.pop_back(); | ||||
7056 | }; | ||||
7057 | |||||
7058 | if (ObjectArg && implicitObjectParamIsLifetimeBound(Callee)) | ||||
7059 | VisitLifetimeBoundArg(Callee, ObjectArg); | ||||
7060 | |||||
7061 | for (unsigned I = 0, | ||||
7062 | N = std::min<unsigned>(Callee->getNumParams(), Args.size()); | ||||
7063 | I != N; ++I) { | ||||
7064 | if (Callee->getParamDecl(I)->hasAttr<LifetimeBoundAttr>()) | ||||
7065 | VisitLifetimeBoundArg(Callee->getParamDecl(I), Args[I]); | ||||
7066 | } | ||||
7067 | } | ||||
7068 | |||||
7069 | /// Visit the locals that would be reachable through a reference bound to the | ||||
7070 | /// glvalue expression \c Init. | ||||
7071 | static void visitLocalsRetainedByReferenceBinding(IndirectLocalPath &Path, | ||||
7072 | Expr *Init, ReferenceKind RK, | ||||
7073 | LocalVisitor Visit, | ||||
7074 | bool EnableLifetimeWarnings) { | ||||
7075 | RevertToOldSizeRAII RAII(Path); | ||||
7076 | |||||
7077 | // Walk past any constructs which we can lifetime-extend across. | ||||
7078 | Expr *Old; | ||||
7079 | do { | ||||
7080 | Old = Init; | ||||
7081 | |||||
7082 | if (auto *FE = dyn_cast<FullExpr>(Init)) | ||||
7083 | Init = FE->getSubExpr(); | ||||
7084 | |||||
7085 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { | ||||
7086 | // If this is just redundant braces around an initializer, step over it. | ||||
7087 | if (ILE->isTransparent()) | ||||
7088 | Init = ILE->getInit(0); | ||||
7089 | } | ||||
7090 | |||||
7091 | // Step over any subobject adjustments; we may have a materialized | ||||
7092 | // temporary inside them. | ||||
7093 | Init = const_cast<Expr *>(Init->skipRValueSubobjectAdjustments()); | ||||
7094 | |||||
7095 | // Per current approach for DR1376, look through casts to reference type | ||||
7096 | // when performing lifetime extension. | ||||
7097 | if (CastExpr *CE = dyn_cast<CastExpr>(Init)) | ||||
7098 | if (CE->getSubExpr()->isGLValue()) | ||||
7099 | Init = CE->getSubExpr(); | ||||
7100 | |||||
7101 | // Per the current approach for DR1299, look through array element access | ||||
7102 | // on array glvalues when performing lifetime extension. | ||||
7103 | if (auto *ASE = dyn_cast<ArraySubscriptExpr>(Init)) { | ||||
7104 | Init = ASE->getBase(); | ||||
7105 | auto *ICE = dyn_cast<ImplicitCastExpr>(Init); | ||||
7106 | if (ICE && ICE->getCastKind() == CK_ArrayToPointerDecay) | ||||
7107 | Init = ICE->getSubExpr(); | ||||
7108 | else | ||||
7109 | // We can't lifetime extend through this but we might still find some | ||||
7110 | // retained temporaries. | ||||
7111 | return visitLocalsRetainedByInitializer(Path, Init, Visit, true, | ||||
7112 | EnableLifetimeWarnings); | ||||
7113 | } | ||||
7114 | |||||
7115 | // Step into CXXDefaultInitExprs so we can diagnose cases where a | ||||
7116 | // constructor inherits one as an implicit mem-initializer. | ||||
7117 | if (auto *DIE = dyn_cast<CXXDefaultInitExpr>(Init)) { | ||||
7118 | Path.push_back( | ||||
7119 | {IndirectLocalPathEntry::DefaultInit, DIE, DIE->getField()}); | ||||
7120 | Init = DIE->getExpr(); | ||||
7121 | } | ||||
7122 | } while (Init != Old); | ||||
7123 | |||||
7124 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(Init)) { | ||||
7125 | if (Visit(Path, Local(MTE), RK)) | ||||
7126 | visitLocalsRetainedByInitializer(Path, MTE->getSubExpr(), Visit, true, | ||||
7127 | EnableLifetimeWarnings); | ||||
7128 | } | ||||
7129 | |||||
7130 | if (isa<CallExpr>(Init)) { | ||||
7131 | if (EnableLifetimeWarnings) | ||||
7132 | handleGslAnnotatedTypes(Path, Init, Visit); | ||||
7133 | return visitLifetimeBoundArguments(Path, Init, Visit); | ||||
7134 | } | ||||
7135 | |||||
7136 | switch (Init->getStmtClass()) { | ||||
7137 | case Stmt::DeclRefExprClass: { | ||||
7138 | // If we find the name of a local non-reference parameter, we could have a | ||||
7139 | // lifetime problem. | ||||
7140 | auto *DRE = cast<DeclRefExpr>(Init); | ||||
7141 | auto *VD = dyn_cast<VarDecl>(DRE->getDecl()); | ||||
7142 | if (VD && VD->hasLocalStorage() && | ||||
7143 | !DRE->refersToEnclosingVariableOrCapture()) { | ||||
7144 | if (!VD->getType()->isReferenceType()) { | ||||
7145 | Visit(Path, Local(DRE), RK); | ||||
7146 | } else if (isa<ParmVarDecl>(DRE->getDecl())) { | ||||
7147 | // The lifetime of a reference parameter is unknown; assume it's OK | ||||
7148 | // for now. | ||||
7149 | break; | ||||
7150 | } else if (VD->getInit() && !isVarOnPath(Path, VD)) { | ||||
7151 | Path.push_back({IndirectLocalPathEntry::VarInit, DRE, VD}); | ||||
7152 | visitLocalsRetainedByReferenceBinding(Path, VD->getInit(), | ||||
7153 | RK_ReferenceBinding, Visit, | ||||
7154 | EnableLifetimeWarnings); | ||||
7155 | } | ||||
7156 | } | ||||
7157 | break; | ||||
7158 | } | ||||
7159 | |||||
7160 | case Stmt::UnaryOperatorClass: { | ||||
7161 | // The only unary operator that make sense to handle here | ||||
7162 | // is Deref. All others don't resolve to a "name." This includes | ||||
7163 | // handling all sorts of rvalues passed to a unary operator. | ||||
7164 | const UnaryOperator *U = cast<UnaryOperator>(Init); | ||||
7165 | if (U->getOpcode() == UO_Deref) | ||||
7166 | visitLocalsRetainedByInitializer(Path, U->getSubExpr(), Visit, true, | ||||
7167 | EnableLifetimeWarnings); | ||||
7168 | break; | ||||
7169 | } | ||||
7170 | |||||
7171 | case Stmt::OMPArraySectionExprClass: { | ||||
7172 | visitLocalsRetainedByInitializer(Path, | ||||
7173 | cast<OMPArraySectionExpr>(Init)->getBase(), | ||||
7174 | Visit, true, EnableLifetimeWarnings); | ||||
7175 | break; | ||||
7176 | } | ||||
7177 | |||||
7178 | case Stmt::ConditionalOperatorClass: | ||||
7179 | case Stmt::BinaryConditionalOperatorClass: { | ||||
7180 | auto *C = cast<AbstractConditionalOperator>(Init); | ||||
7181 | if (!C->getTrueExpr()->getType()->isVoidType()) | ||||
7182 | visitLocalsRetainedByReferenceBinding(Path, C->getTrueExpr(), RK, Visit, | ||||
7183 | EnableLifetimeWarnings); | ||||
7184 | if (!C->getFalseExpr()->getType()->isVoidType()) | ||||
7185 | visitLocalsRetainedByReferenceBinding(Path, C->getFalseExpr(), RK, Visit, | ||||
7186 | EnableLifetimeWarnings); | ||||
7187 | break; | ||||
7188 | } | ||||
7189 | |||||
7190 | // FIXME: Visit the left-hand side of an -> or ->*. | ||||
7191 | |||||
7192 | default: | ||||
7193 | break; | ||||
7194 | } | ||||
7195 | } | ||||
7196 | |||||
7197 | /// Visit the locals that would be reachable through an object initialized by | ||||
7198 | /// the prvalue expression \c Init. | ||||
7199 | static void visitLocalsRetainedByInitializer(IndirectLocalPath &Path, | ||||
7200 | Expr *Init, LocalVisitor Visit, | ||||
7201 | bool RevisitSubinits, | ||||
7202 | bool EnableLifetimeWarnings) { | ||||
7203 | RevertToOldSizeRAII RAII(Path); | ||||
7204 | |||||
7205 | Expr *Old; | ||||
7206 | do { | ||||
7207 | Old = Init; | ||||
7208 | |||||
7209 | // Step into CXXDefaultInitExprs so we can diagnose cases where a | ||||
7210 | // constructor inherits one as an implicit mem-initializer. | ||||
7211 | if (auto *DIE = dyn_cast<CXXDefaultInitExpr>(Init)) { | ||||
7212 | Path.push_back({IndirectLocalPathEntry::DefaultInit, DIE, DIE->getField()}); | ||||
7213 | Init = DIE->getExpr(); | ||||
7214 | } | ||||
7215 | |||||
7216 | if (auto *FE = dyn_cast<FullExpr>(Init)) | ||||
7217 | Init = FE->getSubExpr(); | ||||
7218 | |||||
7219 | // Dig out the expression which constructs the extended temporary. | ||||
7220 | Init = const_cast<Expr *>(Init->skipRValueSubobjectAdjustments()); | ||||
7221 | |||||
7222 | if (CXXBindTemporaryExpr *BTE = dyn_cast<CXXBindTemporaryExpr>(Init)) | ||||
7223 | Init = BTE->getSubExpr(); | ||||
7224 | |||||
7225 | Init = Init->IgnoreParens(); | ||||
7226 | |||||
7227 | // Step over value-preserving rvalue casts. | ||||
7228 | if (auto *CE = dyn_cast<CastExpr>(Init)) { | ||||
7229 | switch (CE->getCastKind()) { | ||||
7230 | case CK_LValueToRValue: | ||||
7231 | // If we can match the lvalue to a const object, we can look at its | ||||
7232 | // initializer. | ||||
7233 | Path.push_back({IndirectLocalPathEntry::LValToRVal, CE}); | ||||
7234 | return visitLocalsRetainedByReferenceBinding( | ||||
7235 | Path, Init, RK_ReferenceBinding, | ||||
7236 | [&](IndirectLocalPath &Path, Local L, ReferenceKind RK) -> bool { | ||||
7237 | if (auto *DRE = dyn_cast<DeclRefExpr>(L)) { | ||||
7238 | auto *VD = dyn_cast<VarDecl>(DRE->getDecl()); | ||||
7239 | if (VD && VD->getType().isConstQualified() && VD->getInit() && | ||||
7240 | !isVarOnPath(Path, VD)) { | ||||
7241 | Path.push_back({IndirectLocalPathEntry::VarInit, DRE, VD}); | ||||
7242 | visitLocalsRetainedByInitializer(Path, VD->getInit(), Visit, true, | ||||
7243 | EnableLifetimeWarnings); | ||||
7244 | } | ||||
7245 | } else if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(L)) { | ||||
7246 | if (MTE->getType().isConstQualified()) | ||||
7247 | visitLocalsRetainedByInitializer(Path, MTE->getSubExpr(), Visit, | ||||
7248 | true, EnableLifetimeWarnings); | ||||
7249 | } | ||||
7250 | return false; | ||||
7251 | }, EnableLifetimeWarnings); | ||||
7252 | |||||
7253 | // We assume that objects can be retained by pointers cast to integers, | ||||
7254 | // but not if the integer is cast to floating-point type or to _Complex. | ||||
7255 | // We assume that casts to 'bool' do not preserve enough information to | ||||
7256 | // retain a local object. | ||||
7257 | case CK_NoOp: | ||||
7258 | case CK_BitCast: | ||||
7259 | case CK_BaseToDerived: | ||||
7260 | case CK_DerivedToBase: | ||||
7261 | case CK_UncheckedDerivedToBase: | ||||
7262 | case CK_Dynamic: | ||||
7263 | case CK_ToUnion: | ||||
7264 | case CK_UserDefinedConversion: | ||||
7265 | case CK_ConstructorConversion: | ||||
7266 | case CK_IntegralToPointer: | ||||
7267 | case CK_PointerToIntegral: | ||||
7268 | case CK_VectorSplat: | ||||
7269 | case CK_IntegralCast: | ||||
7270 | case CK_CPointerToObjCPointerCast: | ||||
7271 | case CK_BlockPointerToObjCPointerCast: | ||||
7272 | case CK_AnyPointerToBlockPointerCast: | ||||
7273 | case CK_AddressSpaceConversion: | ||||
7274 | break; | ||||
7275 | |||||
7276 | case CK_ArrayToPointerDecay: | ||||
7277 | // Model array-to-pointer decay as taking the address of the array | ||||
7278 | // lvalue. | ||||
7279 | Path.push_back({IndirectLocalPathEntry::AddressOf, CE}); | ||||
7280 | return visitLocalsRetainedByReferenceBinding(Path, CE->getSubExpr(), | ||||
7281 | RK_ReferenceBinding, Visit, | ||||
7282 | EnableLifetimeWarnings); | ||||
7283 | |||||
7284 | default: | ||||
7285 | return; | ||||
7286 | } | ||||
7287 | |||||
7288 | Init = CE->getSubExpr(); | ||||
7289 | } | ||||
7290 | } while (Old != Init); | ||||
7291 | |||||
7292 | // C++17 [dcl.init.list]p6: | ||||
7293 | // initializing an initializer_list object from the array extends the | ||||
7294 | // lifetime of the array exactly like binding a reference to a temporary. | ||||
7295 | if (auto *ILE = dyn_cast<CXXStdInitializerListExpr>(Init)) | ||||
7296 | return visitLocalsRetainedByReferenceBinding(Path, ILE->getSubExpr(), | ||||
7297 | RK_StdInitializerList, Visit, | ||||
7298 | EnableLifetimeWarnings); | ||||
7299 | |||||
7300 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { | ||||
7301 | // We already visited the elements of this initializer list while | ||||
7302 | // performing the initialization. Don't visit them again unless we've | ||||
7303 | // changed the lifetime of the initialized entity. | ||||
7304 | if (!RevisitSubinits) | ||||
7305 | return; | ||||
7306 | |||||
7307 | if (ILE->isTransparent()) | ||||
7308 | return visitLocalsRetainedByInitializer(Path, ILE->getInit(0), Visit, | ||||
7309 | RevisitSubinits, | ||||
7310 | EnableLifetimeWarnings); | ||||
7311 | |||||
7312 | if (ILE->getType()->isArrayType()) { | ||||
7313 | for (unsigned I = 0, N = ILE->getNumInits(); I != N; ++I) | ||||
7314 | visitLocalsRetainedByInitializer(Path, ILE->getInit(I), Visit, | ||||
7315 | RevisitSubinits, | ||||
7316 | EnableLifetimeWarnings); | ||||
7317 | return; | ||||
7318 | } | ||||
7319 | |||||
7320 | if (CXXRecordDecl *RD = ILE->getType()->getAsCXXRecordDecl()) { | ||||
7321 | assert(RD->isAggregate() && "aggregate init on non-aggregate")(static_cast <bool> (RD->isAggregate() && "aggregate init on non-aggregate" ) ? void (0) : __assert_fail ("RD->isAggregate() && \"aggregate init on non-aggregate\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 7321, __extension__ __PRETTY_FUNCTION__)); | ||||
7322 | |||||
7323 | // If we lifetime-extend a braced initializer which is initializing an | ||||
7324 | // aggregate, and that aggregate contains reference members which are | ||||
7325 | // bound to temporaries, those temporaries are also lifetime-extended. | ||||
7326 | if (RD->isUnion() && ILE->getInitializedFieldInUnion() && | ||||
7327 | ILE->getInitializedFieldInUnion()->getType()->isReferenceType()) | ||||
7328 | visitLocalsRetainedByReferenceBinding(Path, ILE->getInit(0), | ||||
7329 | RK_ReferenceBinding, Visit, | ||||
7330 | EnableLifetimeWarnings); | ||||
7331 | else { | ||||
7332 | unsigned Index = 0; | ||||
7333 | for (; Index < RD->getNumBases() && Index < ILE->getNumInits(); ++Index) | ||||
7334 | visitLocalsRetainedByInitializer(Path, ILE->getInit(Index), Visit, | ||||
7335 | RevisitSubinits, | ||||
7336 | EnableLifetimeWarnings); | ||||
7337 | for (const auto *I : RD->fields()) { | ||||
7338 | if (Index >= ILE->getNumInits()) | ||||
7339 | break; | ||||
7340 | if (I->isUnnamedBitfield()) | ||||
7341 | continue; | ||||
7342 | Expr *SubInit = ILE->getInit(Index); | ||||
7343 | if (I->getType()->isReferenceType()) | ||||
7344 | visitLocalsRetainedByReferenceBinding(Path, SubInit, | ||||
7345 | RK_ReferenceBinding, Visit, | ||||
7346 | EnableLifetimeWarnings); | ||||
7347 | else | ||||
7348 | // This might be either aggregate-initialization of a member or | ||||
7349 | // initialization of a std::initializer_list object. Regardless, | ||||
7350 | // we should recursively lifetime-extend that initializer. | ||||
7351 | visitLocalsRetainedByInitializer(Path, SubInit, Visit, | ||||
7352 | RevisitSubinits, | ||||
7353 | EnableLifetimeWarnings); | ||||
7354 | ++Index; | ||||
7355 | } | ||||
7356 | } | ||||
7357 | } | ||||
7358 | return; | ||||
7359 | } | ||||
7360 | |||||
7361 | // The lifetime of an init-capture is that of the closure object constructed | ||||
7362 | // by a lambda-expression. | ||||
7363 | if (auto *LE = dyn_cast<LambdaExpr>(Init)) { | ||||
7364 | LambdaExpr::capture_iterator CapI = LE->capture_begin(); | ||||
7365 | for (Expr *E : LE->capture_inits()) { | ||||
7366 | assert(CapI != LE->capture_end())(static_cast <bool> (CapI != LE->capture_end()) ? void (0) : __assert_fail ("CapI != LE->capture_end()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 7366, __extension__ __PRETTY_FUNCTION__)); | ||||
7367 | const LambdaCapture &Cap = *CapI++; | ||||
7368 | if (!E) | ||||
7369 | continue; | ||||
7370 | if (Cap.capturesVariable()) | ||||
7371 | Path.push_back({IndirectLocalPathEntry::LambdaCaptureInit, E, &Cap}); | ||||
7372 | if (E->isGLValue()) | ||||
7373 | visitLocalsRetainedByReferenceBinding(Path, E, RK_ReferenceBinding, | ||||
7374 | Visit, EnableLifetimeWarnings); | ||||
7375 | else | ||||
7376 | visitLocalsRetainedByInitializer(Path, E, Visit, true, | ||||
7377 | EnableLifetimeWarnings); | ||||
7378 | if (Cap.capturesVariable()) | ||||
7379 | Path.pop_back(); | ||||
7380 | } | ||||
7381 | } | ||||
7382 | |||||
7383 | // Assume that a copy or move from a temporary references the same objects | ||||
7384 | // that the temporary does. | ||||
7385 | if (auto *CCE = dyn_cast<CXXConstructExpr>(Init)) { | ||||
7386 | if (CCE->getConstructor()->isCopyOrMoveConstructor()) { | ||||
7387 | if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(CCE->getArg(0))) { | ||||
7388 | Expr *Arg = MTE->getSubExpr(); | ||||
7389 | Path.push_back({IndirectLocalPathEntry::TemporaryCopy, Arg, | ||||
7390 | CCE->getConstructor()}); | ||||
7391 | visitLocalsRetainedByInitializer(Path, Arg, Visit, true, | ||||
7392 | /*EnableLifetimeWarnings*/false); | ||||
7393 | Path.pop_back(); | ||||
7394 | } | ||||
7395 | } | ||||
7396 | } | ||||
7397 | |||||
7398 | if (isa<CallExpr>(Init) || isa<CXXConstructExpr>(Init)) { | ||||
7399 | if (EnableLifetimeWarnings) | ||||
7400 | handleGslAnnotatedTypes(Path, Init, Visit); | ||||
7401 | return visitLifetimeBoundArguments(Path, Init, Visit); | ||||
7402 | } | ||||
7403 | |||||
7404 | switch (Init->getStmtClass()) { | ||||
7405 | case Stmt::UnaryOperatorClass: { | ||||
7406 | auto *UO = cast<UnaryOperator>(Init); | ||||
7407 | // If the initializer is the address of a local, we could have a lifetime | ||||
7408 | // problem. | ||||
7409 | if (UO->getOpcode() == UO_AddrOf) { | ||||
7410 | // If this is &rvalue, then it's ill-formed and we have already diagnosed | ||||
7411 | // it. Don't produce a redundant warning about the lifetime of the | ||||
7412 | // temporary. | ||||
7413 | if (isa<MaterializeTemporaryExpr>(UO->getSubExpr())) | ||||
7414 | return; | ||||
7415 | |||||
7416 | Path.push_back({IndirectLocalPathEntry::AddressOf, UO}); | ||||
7417 | visitLocalsRetainedByReferenceBinding(Path, UO->getSubExpr(), | ||||
7418 | RK_ReferenceBinding, Visit, | ||||
7419 | EnableLifetimeWarnings); | ||||
7420 | } | ||||
7421 | break; | ||||
7422 | } | ||||
7423 | |||||
7424 | case Stmt::BinaryOperatorClass: { | ||||
7425 | // Handle pointer arithmetic. | ||||
7426 | auto *BO = cast<BinaryOperator>(Init); | ||||
7427 | BinaryOperatorKind BOK = BO->getOpcode(); | ||||
7428 | if (!BO->getType()->isPointerType() || (BOK != BO_Add && BOK != BO_Sub)) | ||||
7429 | break; | ||||
7430 | |||||
7431 | if (BO->getLHS()->getType()->isPointerType()) | ||||
7432 | visitLocalsRetainedByInitializer(Path, BO->getLHS(), Visit, true, | ||||
7433 | EnableLifetimeWarnings); | ||||
7434 | else if (BO->getRHS()->getType()->isPointerType()) | ||||
7435 | visitLocalsRetainedByInitializer(Path, BO->getRHS(), Visit, true, | ||||
7436 | EnableLifetimeWarnings); | ||||
7437 | break; | ||||
7438 | } | ||||
7439 | |||||
7440 | case Stmt::ConditionalOperatorClass: | ||||
7441 | case Stmt::BinaryConditionalOperatorClass: { | ||||
7442 | auto *C = cast<AbstractConditionalOperator>(Init); | ||||
7443 | // In C++, we can have a throw-expression operand, which has 'void' type | ||||
7444 | // and isn't interesting from a lifetime perspective. | ||||
7445 | if (!C->getTrueExpr()->getType()->isVoidType()) | ||||
7446 | visitLocalsRetainedByInitializer(Path, C->getTrueExpr(), Visit, true, | ||||
7447 | EnableLifetimeWarnings); | ||||
7448 | if (!C->getFalseExpr()->getType()->isVoidType()) | ||||
7449 | visitLocalsRetainedByInitializer(Path, C->getFalseExpr(), Visit, true, | ||||
7450 | EnableLifetimeWarnings); | ||||
7451 | break; | ||||
7452 | } | ||||
7453 | |||||
7454 | case Stmt::BlockExprClass: | ||||
7455 | if (cast<BlockExpr>(Init)->getBlockDecl()->hasCaptures()) { | ||||
7456 | // This is a local block, whose lifetime is that of the function. | ||||
7457 | Visit(Path, Local(cast<BlockExpr>(Init)), RK_ReferenceBinding); | ||||
7458 | } | ||||
7459 | break; | ||||
7460 | |||||
7461 | case Stmt::AddrLabelExprClass: | ||||
7462 | // We want to warn if the address of a label would escape the function. | ||||
7463 | Visit(Path, Local(cast<AddrLabelExpr>(Init)), RK_ReferenceBinding); | ||||
7464 | break; | ||||
7465 | |||||
7466 | default: | ||||
7467 | break; | ||||
7468 | } | ||||
7469 | } | ||||
7470 | |||||
7471 | /// Whether a path to an object supports lifetime extension. | ||||
7472 | enum PathLifetimeKind { | ||||
7473 | /// Lifetime-extend along this path. | ||||
7474 | Extend, | ||||
7475 | /// We should lifetime-extend, but we don't because (due to technical | ||||
7476 | /// limitations) we can't. This happens for default member initializers, | ||||
7477 | /// which we don't clone for every use, so we don't have a unique | ||||
7478 | /// MaterializeTemporaryExpr to update. | ||||
7479 | ShouldExtend, | ||||
7480 | /// Do not lifetime extend along this path. | ||||
7481 | NoExtend | ||||
7482 | }; | ||||
7483 | |||||
7484 | /// Determine whether this is an indirect path to a temporary that we are | ||||
7485 | /// supposed to lifetime-extend along. | ||||
7486 | static PathLifetimeKind | ||||
7487 | shouldLifetimeExtendThroughPath(const IndirectLocalPath &Path) { | ||||
7488 | PathLifetimeKind Kind = PathLifetimeKind::Extend; | ||||
7489 | for (auto Elem : Path) { | ||||
7490 | if (Elem.Kind == IndirectLocalPathEntry::DefaultInit) | ||||
7491 | Kind = PathLifetimeKind::ShouldExtend; | ||||
7492 | else if (Elem.Kind != IndirectLocalPathEntry::LambdaCaptureInit) | ||||
7493 | return PathLifetimeKind::NoExtend; | ||||
7494 | } | ||||
7495 | return Kind; | ||||
7496 | } | ||||
7497 | |||||
7498 | /// Find the range for the first interesting entry in the path at or after I. | ||||
7499 | static SourceRange nextPathEntryRange(const IndirectLocalPath &Path, unsigned I, | ||||
7500 | Expr *E) { | ||||
7501 | for (unsigned N = Path.size(); I != N; ++I) { | ||||
7502 | switch (Path[I].Kind) { | ||||
7503 | case IndirectLocalPathEntry::AddressOf: | ||||
7504 | case IndirectLocalPathEntry::LValToRVal: | ||||
7505 | case IndirectLocalPathEntry::LifetimeBoundCall: | ||||
7506 | case IndirectLocalPathEntry::TemporaryCopy: | ||||
7507 | case IndirectLocalPathEntry::GslReferenceInit: | ||||
7508 | case IndirectLocalPathEntry::GslPointerInit: | ||||
7509 | // These exist primarily to mark the path as not permitting or | ||||
7510 | // supporting lifetime extension. | ||||
7511 | break; | ||||
7512 | |||||
7513 | case IndirectLocalPathEntry::VarInit: | ||||
7514 | if (cast<VarDecl>(Path[I].D)->isImplicit()) | ||||
7515 | return SourceRange(); | ||||
7516 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
7517 | case IndirectLocalPathEntry::DefaultInit: | ||||
7518 | return Path[I].E->getSourceRange(); | ||||
7519 | |||||
7520 | case IndirectLocalPathEntry::LambdaCaptureInit: | ||||
7521 | if (!Path[I].Capture->capturesVariable()) | ||||
7522 | continue; | ||||
7523 | return Path[I].E->getSourceRange(); | ||||
7524 | } | ||||
7525 | } | ||||
7526 | return E->getSourceRange(); | ||||
7527 | } | ||||
7528 | |||||
7529 | static bool pathOnlyInitializesGslPointer(IndirectLocalPath &Path) { | ||||
7530 | for (auto It = Path.rbegin(), End = Path.rend(); It != End; ++It) { | ||||
7531 | if (It->Kind == IndirectLocalPathEntry::VarInit) | ||||
7532 | continue; | ||||
7533 | if (It->Kind == IndirectLocalPathEntry::AddressOf) | ||||
7534 | continue; | ||||
7535 | if (It->Kind == IndirectLocalPathEntry::LifetimeBoundCall) | ||||
7536 | continue; | ||||
7537 | return It->Kind == IndirectLocalPathEntry::GslPointerInit || | ||||
7538 | It->Kind == IndirectLocalPathEntry::GslReferenceInit; | ||||
7539 | } | ||||
7540 | return false; | ||||
7541 | } | ||||
7542 | |||||
7543 | void Sema::checkInitializerLifetime(const InitializedEntity &Entity, | ||||
7544 | Expr *Init) { | ||||
7545 | LifetimeResult LR = getEntityLifetime(&Entity); | ||||
7546 | LifetimeKind LK = LR.getInt(); | ||||
7547 | const InitializedEntity *ExtendingEntity = LR.getPointer(); | ||||
7548 | |||||
7549 | // If this entity doesn't have an interesting lifetime, don't bother looking | ||||
7550 | // for temporaries within its initializer. | ||||
7551 | if (LK == LK_FullExpression) | ||||
7552 | return; | ||||
7553 | |||||
7554 | auto TemporaryVisitor = [&](IndirectLocalPath &Path, Local L, | ||||
7555 | ReferenceKind RK) -> bool { | ||||
7556 | SourceRange DiagRange = nextPathEntryRange(Path, 0, L); | ||||
7557 | SourceLocation DiagLoc = DiagRange.getBegin(); | ||||
7558 | |||||
7559 | auto *MTE = dyn_cast<MaterializeTemporaryExpr>(L); | ||||
7560 | |||||
7561 | bool IsGslPtrInitWithGslTempOwner = false; | ||||
7562 | bool IsLocalGslOwner = false; | ||||
7563 | if (pathOnlyInitializesGslPointer(Path)) { | ||||
7564 | if (isa<DeclRefExpr>(L)) { | ||||
7565 | // We do not want to follow the references when returning a pointer originating | ||||
7566 | // from a local owner to avoid the following false positive: | ||||
7567 | // int &p = *localUniquePtr; | ||||
7568 | // someContainer.add(std::move(localUniquePtr)); | ||||
7569 | // return p; | ||||
7570 | IsLocalGslOwner = isRecordWithAttr<OwnerAttr>(L->getType()); | ||||
7571 | if (pathContainsInit(Path) || !IsLocalGslOwner) | ||||
7572 | return false; | ||||
7573 | } else { | ||||
7574 | IsGslPtrInitWithGslTempOwner = MTE && !MTE->getExtendingDecl() && | ||||
7575 | isRecordWithAttr<OwnerAttr>(MTE->getType()); | ||||
7576 | // Skipping a chain of initializing gsl::Pointer annotated objects. | ||||
7577 | // We are looking only for the final source to find out if it was | ||||
7578 | // a local or temporary owner or the address of a local variable/param. | ||||
7579 | if (!IsGslPtrInitWithGslTempOwner) | ||||
7580 | return true; | ||||
7581 | } | ||||
7582 | } | ||||
7583 | |||||
7584 | switch (LK) { | ||||
7585 | case LK_FullExpression: | ||||
7586 | llvm_unreachable("already handled this")::llvm::llvm_unreachable_internal("already handled this", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 7586); | ||||
7587 | |||||
7588 | case LK_Extended: { | ||||
7589 | if (!MTE) { | ||||
7590 | // The initialized entity has lifetime beyond the full-expression, | ||||
7591 | // and the local entity does too, so don't warn. | ||||
7592 | // | ||||
7593 | // FIXME: We should consider warning if a static / thread storage | ||||
7594 | // duration variable retains an automatic storage duration local. | ||||
7595 | return false; | ||||
7596 | } | ||||
7597 | |||||
7598 | if (IsGslPtrInitWithGslTempOwner && DiagLoc.isValid()) { | ||||
7599 | Diag(DiagLoc, diag::warn_dangling_lifetime_pointer) << DiagRange; | ||||
7600 | return false; | ||||
7601 | } | ||||
7602 | |||||
7603 | switch (shouldLifetimeExtendThroughPath(Path)) { | ||||
7604 | case PathLifetimeKind::Extend: | ||||
7605 | // Update the storage duration of the materialized temporary. | ||||
7606 | // FIXME: Rebuild the expression instead of mutating it. | ||||
7607 | MTE->setExtendingDecl(ExtendingEntity->getDecl(), | ||||
7608 | ExtendingEntity->allocateManglingNumber()); | ||||
7609 | // Also visit the temporaries lifetime-extended by this initializer. | ||||
7610 | return true; | ||||
7611 | |||||
7612 | case PathLifetimeKind::ShouldExtend: | ||||
7613 | // We're supposed to lifetime-extend the temporary along this path (per | ||||
7614 | // the resolution of DR1815), but we don't support that yet. | ||||
7615 | // | ||||
7616 | // FIXME: Properly handle this situation. Perhaps the easiest approach | ||||
7617 | // would be to clone the initializer expression on each use that would | ||||
7618 | // lifetime extend its temporaries. | ||||
7619 | Diag(DiagLoc, diag::warn_unsupported_lifetime_extension) | ||||
7620 | << RK << DiagRange; | ||||
7621 | break; | ||||
7622 | |||||
7623 | case PathLifetimeKind::NoExtend: | ||||
7624 | // If the path goes through the initialization of a variable or field, | ||||
7625 | // it can't possibly reach a temporary created in this full-expression. | ||||
7626 | // We will have already diagnosed any problems with the initializer. | ||||
7627 | if (pathContainsInit(Path)) | ||||
7628 | return false; | ||||
7629 | |||||
7630 | Diag(DiagLoc, diag::warn_dangling_variable) | ||||
7631 | << RK << !Entity.getParent() | ||||
7632 | << ExtendingEntity->getDecl()->isImplicit() | ||||
7633 | << ExtendingEntity->getDecl() << Init->isGLValue() << DiagRange; | ||||
7634 | break; | ||||
7635 | } | ||||
7636 | break; | ||||
7637 | } | ||||
7638 | |||||
7639 | case LK_MemInitializer: { | ||||
7640 | if (isa<MaterializeTemporaryExpr>(L)) { | ||||
7641 | // Under C++ DR1696, if a mem-initializer (or a default member | ||||
7642 | // initializer used by the absence of one) would lifetime-extend a | ||||
7643 | // temporary, the program is ill-formed. | ||||
7644 | if (auto *ExtendingDecl = | ||||
7645 | ExtendingEntity ? ExtendingEntity->getDecl() : nullptr) { | ||||
7646 | if (IsGslPtrInitWithGslTempOwner) { | ||||
7647 | Diag(DiagLoc, diag::warn_dangling_lifetime_pointer_member) | ||||
7648 | << ExtendingDecl << DiagRange; | ||||
7649 | Diag(ExtendingDecl->getLocation(), | ||||
7650 | diag::note_ref_or_ptr_member_declared_here) | ||||
7651 | << true; | ||||
7652 | return false; | ||||
7653 | } | ||||
7654 | bool IsSubobjectMember = ExtendingEntity != &Entity; | ||||
7655 | Diag(DiagLoc, shouldLifetimeExtendThroughPath(Path) != | ||||
7656 | PathLifetimeKind::NoExtend | ||||
7657 | ? diag::err_dangling_member | ||||
7658 | : diag::warn_dangling_member) | ||||
7659 | << ExtendingDecl << IsSubobjectMember << RK << DiagRange; | ||||
7660 | // Don't bother adding a note pointing to the field if we're inside | ||||
7661 | // its default member initializer; our primary diagnostic points to | ||||
7662 | // the same place in that case. | ||||
7663 | if (Path.empty() || | ||||
7664 | Path.back().Kind != IndirectLocalPathEntry::DefaultInit) { | ||||
7665 | Diag(ExtendingDecl->getLocation(), | ||||
7666 | diag::note_lifetime_extending_member_declared_here) | ||||
7667 | << RK << IsSubobjectMember; | ||||
7668 | } | ||||
7669 | } else { | ||||
7670 | // We have a mem-initializer but no particular field within it; this | ||||
7671 | // is either a base class or a delegating initializer directly | ||||
7672 | // initializing the base-class from something that doesn't live long | ||||
7673 | // enough. | ||||
7674 | // | ||||
7675 | // FIXME: Warn on this. | ||||
7676 | return false; | ||||
7677 | } | ||||
7678 | } else { | ||||
7679 | // Paths via a default initializer can only occur during error recovery | ||||
7680 | // (there's no other way that a default initializer can refer to a | ||||
7681 | // local). Don't produce a bogus warning on those cases. | ||||
7682 | if (pathContainsInit(Path)) | ||||
7683 | return false; | ||||
7684 | |||||
7685 | // Suppress false positives for code like the one below: | ||||
7686 | // Ctor(unique_ptr<T> up) : member(*up), member2(move(up)) {} | ||||
7687 | if (IsLocalGslOwner && pathOnlyInitializesGslPointer(Path)) | ||||
7688 | return false; | ||||
7689 | |||||
7690 | auto *DRE = dyn_cast<DeclRefExpr>(L); | ||||
7691 | auto *VD = DRE ? dyn_cast<VarDecl>(DRE->getDecl()) : nullptr; | ||||
7692 | if (!VD) { | ||||
7693 | // A member was initialized to a local block. | ||||
7694 | // FIXME: Warn on this. | ||||
7695 | return false; | ||||
7696 | } | ||||
7697 | |||||
7698 | if (auto *Member = | ||||
7699 | ExtendingEntity ? ExtendingEntity->getDecl() : nullptr) { | ||||
7700 | bool IsPointer = !Member->getType()->isReferenceType(); | ||||
7701 | Diag(DiagLoc, IsPointer ? diag::warn_init_ptr_member_to_parameter_addr | ||||
7702 | : diag::warn_bind_ref_member_to_parameter) | ||||
7703 | << Member << VD << isa<ParmVarDecl>(VD) << DiagRange; | ||||
7704 | Diag(Member->getLocation(), | ||||
7705 | diag::note_ref_or_ptr_member_declared_here) | ||||
7706 | << (unsigned)IsPointer; | ||||
7707 | } | ||||
7708 | } | ||||
7709 | break; | ||||
7710 | } | ||||
7711 | |||||
7712 | case LK_New: | ||||
7713 | if (isa<MaterializeTemporaryExpr>(L)) { | ||||
7714 | if (IsGslPtrInitWithGslTempOwner) | ||||
7715 | Diag(DiagLoc, diag::warn_dangling_lifetime_pointer) << DiagRange; | ||||
7716 | else | ||||
7717 | Diag(DiagLoc, RK == RK_ReferenceBinding | ||||
7718 | ? diag::warn_new_dangling_reference | ||||
7719 | : diag::warn_new_dangling_initializer_list) | ||||
7720 | << !Entity.getParent() << DiagRange; | ||||
7721 | } else { | ||||
7722 | // We can't determine if the allocation outlives the local declaration. | ||||
7723 | return false; | ||||
7724 | } | ||||
7725 | break; | ||||
7726 | |||||
7727 | case LK_Return: | ||||
7728 | case LK_StmtExprResult: | ||||
7729 | if (auto *DRE = dyn_cast<DeclRefExpr>(L)) { | ||||
7730 | // We can't determine if the local variable outlives the statement | ||||
7731 | // expression. | ||||
7732 | if (LK == LK_StmtExprResult) | ||||
7733 | return false; | ||||
7734 | Diag(DiagLoc, diag::warn_ret_stack_addr_ref) | ||||
7735 | << Entity.getType()->isReferenceType() << DRE->getDecl() | ||||
7736 | << isa<ParmVarDecl>(DRE->getDecl()) << DiagRange; | ||||
7737 | } else if (isa<BlockExpr>(L)) { | ||||
7738 | Diag(DiagLoc, diag::err_ret_local_block) << DiagRange; | ||||
7739 | } else if (isa<AddrLabelExpr>(L)) { | ||||
7740 | // Don't warn when returning a label from a statement expression. | ||||
7741 | // Leaving the scope doesn't end its lifetime. | ||||
7742 | if (LK == LK_StmtExprResult) | ||||
7743 | return false; | ||||
7744 | Diag(DiagLoc, diag::warn_ret_addr_label) << DiagRange; | ||||
7745 | } else { | ||||
7746 | Diag(DiagLoc, diag::warn_ret_local_temp_addr_ref) | ||||
7747 | << Entity.getType()->isReferenceType() << DiagRange; | ||||
7748 | } | ||||
7749 | break; | ||||
7750 | } | ||||
7751 | |||||
7752 | for (unsigned I = 0; I != Path.size(); ++I) { | ||||
7753 | auto Elem = Path[I]; | ||||
7754 | |||||
7755 | switch (Elem.Kind) { | ||||
7756 | case IndirectLocalPathEntry::AddressOf: | ||||
7757 | case IndirectLocalPathEntry::LValToRVal: | ||||
7758 | // These exist primarily to mark the path as not permitting or | ||||
7759 | // supporting lifetime extension. | ||||
7760 | break; | ||||
7761 | |||||
7762 | case IndirectLocalPathEntry::LifetimeBoundCall: | ||||
7763 | case IndirectLocalPathEntry::TemporaryCopy: | ||||
7764 | case IndirectLocalPathEntry::GslPointerInit: | ||||
7765 | case IndirectLocalPathEntry::GslReferenceInit: | ||||
7766 | // FIXME: Consider adding a note for these. | ||||
7767 | break; | ||||
7768 | |||||
7769 | case IndirectLocalPathEntry::DefaultInit: { | ||||
7770 | auto *FD = cast<FieldDecl>(Elem.D); | ||||
7771 | Diag(FD->getLocation(), diag::note_init_with_default_member_initalizer) | ||||
7772 | << FD << nextPathEntryRange(Path, I + 1, L); | ||||
7773 | break; | ||||
7774 | } | ||||
7775 | |||||
7776 | case IndirectLocalPathEntry::VarInit: { | ||||
7777 | const VarDecl *VD = cast<VarDecl>(Elem.D); | ||||
7778 | Diag(VD->getLocation(), diag::note_local_var_initializer) | ||||
7779 | << VD->getType()->isReferenceType() | ||||
7780 | << VD->isImplicit() << VD->getDeclName() | ||||
7781 | << nextPathEntryRange(Path, I + 1, L); | ||||
7782 | break; | ||||
7783 | } | ||||
7784 | |||||
7785 | case IndirectLocalPathEntry::LambdaCaptureInit: | ||||
7786 | if (!Elem.Capture->capturesVariable()) | ||||
7787 | break; | ||||
7788 | // FIXME: We can't easily tell apart an init-capture from a nested | ||||
7789 | // capture of an init-capture. | ||||
7790 | const VarDecl *VD = Elem.Capture->getCapturedVar(); | ||||
7791 | Diag(Elem.Capture->getLocation(), diag::note_lambda_capture_initializer) | ||||
7792 | << VD << VD->isInitCapture() << Elem.Capture->isExplicit() | ||||
7793 | << (Elem.Capture->getCaptureKind() == LCK_ByRef) << VD | ||||
7794 | << nextPathEntryRange(Path, I + 1, L); | ||||
7795 | break; | ||||
7796 | } | ||||
7797 | } | ||||
7798 | |||||
7799 | // We didn't lifetime-extend, so don't go any further; we don't need more | ||||
7800 | // warnings or errors on inner temporaries within this one's initializer. | ||||
7801 | return false; | ||||
7802 | }; | ||||
7803 | |||||
7804 | bool EnableLifetimeWarnings = !getDiagnostics().isIgnored( | ||||
7805 | diag::warn_dangling_lifetime_pointer, SourceLocation()); | ||||
7806 | llvm::SmallVector<IndirectLocalPathEntry, 8> Path; | ||||
7807 | if (Init->isGLValue()) | ||||
7808 | visitLocalsRetainedByReferenceBinding(Path, Init, RK_ReferenceBinding, | ||||
7809 | TemporaryVisitor, | ||||
7810 | EnableLifetimeWarnings); | ||||
7811 | else | ||||
7812 | visitLocalsRetainedByInitializer(Path, Init, TemporaryVisitor, false, | ||||
7813 | EnableLifetimeWarnings); | ||||
7814 | } | ||||
7815 | |||||
7816 | static void DiagnoseNarrowingInInitList(Sema &S, | ||||
7817 | const ImplicitConversionSequence &ICS, | ||||
7818 | QualType PreNarrowingType, | ||||
7819 | QualType EntityType, | ||||
7820 | const Expr *PostInit); | ||||
7821 | |||||
7822 | /// Provide warnings when std::move is used on construction. | ||||
7823 | static void CheckMoveOnConstruction(Sema &S, const Expr *InitExpr, | ||||
7824 | bool IsReturnStmt) { | ||||
7825 | if (!InitExpr) | ||||
7826 | return; | ||||
7827 | |||||
7828 | if (S.inTemplateInstantiation()) | ||||
7829 | return; | ||||
7830 | |||||
7831 | QualType DestType = InitExpr->getType(); | ||||
7832 | if (!DestType->isRecordType()) | ||||
7833 | return; | ||||
7834 | |||||
7835 | unsigned DiagID = 0; | ||||
7836 | if (IsReturnStmt) { | ||||
7837 | const CXXConstructExpr *CCE = | ||||
7838 | dyn_cast<CXXConstructExpr>(InitExpr->IgnoreParens()); | ||||
7839 | if (!CCE || CCE->getNumArgs() != 1) | ||||
7840 | return; | ||||
7841 | |||||
7842 | if (!CCE->getConstructor()->isCopyOrMoveConstructor()) | ||||
7843 | return; | ||||
7844 | |||||
7845 | InitExpr = CCE->getArg(0)->IgnoreImpCasts(); | ||||
7846 | } | ||||
7847 | |||||
7848 | // Find the std::move call and get the argument. | ||||
7849 | const CallExpr *CE = dyn_cast<CallExpr>(InitExpr->IgnoreParens()); | ||||
7850 | if (!CE || !CE->isCallToStdMove()) | ||||
7851 | return; | ||||
7852 | |||||
7853 | const Expr *Arg = CE->getArg(0)->IgnoreImplicit(); | ||||
7854 | |||||
7855 | if (IsReturnStmt) { | ||||
7856 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Arg->IgnoreParenImpCasts()); | ||||
7857 | if (!DRE || DRE->refersToEnclosingVariableOrCapture()) | ||||
7858 | return; | ||||
7859 | |||||
7860 | const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl()); | ||||
7861 | if (!VD || !VD->hasLocalStorage()) | ||||
7862 | return; | ||||
7863 | |||||
7864 | // __block variables are not moved implicitly. | ||||
7865 | if (VD->hasAttr<BlocksAttr>()) | ||||
7866 | return; | ||||
7867 | |||||
7868 | QualType SourceType = VD->getType(); | ||||
7869 | if (!SourceType->isRecordType()) | ||||
7870 | return; | ||||
7871 | |||||
7872 | if (!S.Context.hasSameUnqualifiedType(DestType, SourceType)) { | ||||
7873 | return; | ||||
7874 | } | ||||
7875 | |||||
7876 | // If we're returning a function parameter, copy elision | ||||
7877 | // is not possible. | ||||
7878 | if (isa<ParmVarDecl>(VD)) | ||||
7879 | DiagID = diag::warn_redundant_move_on_return; | ||||
7880 | else | ||||
7881 | DiagID = diag::warn_pessimizing_move_on_return; | ||||
7882 | } else { | ||||
7883 | DiagID = diag::warn_pessimizing_move_on_initialization; | ||||
7884 | const Expr *ArgStripped = Arg->IgnoreImplicit()->IgnoreParens(); | ||||
7885 | if (!ArgStripped->isPRValue() || !ArgStripped->getType()->isRecordType()) | ||||
7886 | return; | ||||
7887 | } | ||||
7888 | |||||
7889 | S.Diag(CE->getBeginLoc(), DiagID); | ||||
7890 | |||||
7891 | // Get all the locations for a fix-it. Don't emit the fix-it if any location | ||||
7892 | // is within a macro. | ||||
7893 | SourceLocation CallBegin = CE->getCallee()->getBeginLoc(); | ||||
7894 | if (CallBegin.isMacroID()) | ||||
7895 | return; | ||||
7896 | SourceLocation RParen = CE->getRParenLoc(); | ||||
7897 | if (RParen.isMacroID()) | ||||
7898 | return; | ||||
7899 | SourceLocation LParen; | ||||
7900 | SourceLocation ArgLoc = Arg->getBeginLoc(); | ||||
7901 | |||||
7902 | // Special testing for the argument location. Since the fix-it needs the | ||||
7903 | // location right before the argument, the argument location can be in a | ||||
7904 | // macro only if it is at the beginning of the macro. | ||||
7905 | while (ArgLoc.isMacroID() && | ||||
7906 | S.getSourceManager().isAtStartOfImmediateMacroExpansion(ArgLoc)) { | ||||
7907 | ArgLoc = S.getSourceManager().getImmediateExpansionRange(ArgLoc).getBegin(); | ||||
7908 | } | ||||
7909 | |||||
7910 | if (LParen.isMacroID()) | ||||
7911 | return; | ||||
7912 | |||||
7913 | LParen = ArgLoc.getLocWithOffset(-1); | ||||
7914 | |||||
7915 | S.Diag(CE->getBeginLoc(), diag::note_remove_move) | ||||
7916 | << FixItHint::CreateRemoval(SourceRange(CallBegin, LParen)) | ||||
7917 | << FixItHint::CreateRemoval(SourceRange(RParen, RParen)); | ||||
7918 | } | ||||
7919 | |||||
7920 | static void CheckForNullPointerDereference(Sema &S, const Expr *E) { | ||||
7921 | // Check to see if we are dereferencing a null pointer. If so, this is | ||||
7922 | // undefined behavior, so warn about it. This only handles the pattern | ||||
7923 | // "*null", which is a very syntactic check. | ||||
7924 | if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E->IgnoreParenCasts())) | ||||
7925 | if (UO->getOpcode() == UO_Deref && | ||||
7926 | UO->getSubExpr()->IgnoreParenCasts()-> | ||||
7927 | isNullPointerConstant(S.Context, Expr::NPC_ValueDependentIsNotNull)) { | ||||
7928 | S.DiagRuntimeBehavior(UO->getOperatorLoc(), UO, | ||||
7929 | S.PDiag(diag::warn_binding_null_to_reference) | ||||
7930 | << UO->getSubExpr()->getSourceRange()); | ||||
7931 | } | ||||
7932 | } | ||||
7933 | |||||
7934 | MaterializeTemporaryExpr * | ||||
7935 | Sema::CreateMaterializeTemporaryExpr(QualType T, Expr *Temporary, | ||||
7936 | bool BoundToLvalueReference) { | ||||
7937 | auto MTE = new (Context) | ||||
7938 | MaterializeTemporaryExpr(T, Temporary, BoundToLvalueReference); | ||||
7939 | |||||
7940 | // Order an ExprWithCleanups for lifetime marks. | ||||
7941 | // | ||||
7942 | // TODO: It'll be good to have a single place to check the access of the | ||||
7943 | // destructor and generate ExprWithCleanups for various uses. Currently these | ||||
7944 | // are done in both CreateMaterializeTemporaryExpr and MaybeBindToTemporary, | ||||
7945 | // but there may be a chance to merge them. | ||||
7946 | Cleanup.setExprNeedsCleanups(false); | ||||
7947 | return MTE; | ||||
7948 | } | ||||
7949 | |||||
7950 | ExprResult Sema::TemporaryMaterializationConversion(Expr *E) { | ||||
7951 | // In C++98, we don't want to implicitly create an xvalue. | ||||
7952 | // FIXME: This means that AST consumers need to deal with "prvalues" that | ||||
7953 | // denote materialized temporaries. Maybe we should add another ValueKind | ||||
7954 | // for "xvalue pretending to be a prvalue" for C++98 support. | ||||
7955 | if (!E->isPRValue() || !getLangOpts().CPlusPlus11) | ||||
7956 | return E; | ||||
7957 | |||||
7958 | // C++1z [conv.rval]/1: T shall be a complete type. | ||||
7959 | // FIXME: Does this ever matter (can we form a prvalue of incomplete type)? | ||||
7960 | // If so, we should check for a non-abstract class type here too. | ||||
7961 | QualType T = E->getType(); | ||||
7962 | if (RequireCompleteType(E->getExprLoc(), T, diag::err_incomplete_type)) | ||||
7963 | return ExprError(); | ||||
7964 | |||||
7965 | return CreateMaterializeTemporaryExpr(E->getType(), E, false); | ||||
7966 | } | ||||
7967 | |||||
7968 | ExprResult Sema::PerformQualificationConversion(Expr *E, QualType Ty, | ||||
7969 | ExprValueKind VK, | ||||
7970 | CheckedConversionKind CCK) { | ||||
7971 | |||||
7972 | CastKind CK = CK_NoOp; | ||||
7973 | |||||
7974 | if (VK == VK_PRValue) { | ||||
7975 | auto PointeeTy = Ty->getPointeeType(); | ||||
7976 | auto ExprPointeeTy = E->getType()->getPointeeType(); | ||||
7977 | if (!PointeeTy.isNull() && | ||||
7978 | PointeeTy.getAddressSpace() != ExprPointeeTy.getAddressSpace()) | ||||
7979 | CK = CK_AddressSpaceConversion; | ||||
7980 | } else if (Ty.getAddressSpace() != E->getType().getAddressSpace()) { | ||||
7981 | CK = CK_AddressSpaceConversion; | ||||
7982 | } | ||||
7983 | |||||
7984 | return ImpCastExprToType(E, Ty, CK, VK, /*BasePath=*/nullptr, CCK); | ||||
7985 | } | ||||
7986 | |||||
7987 | ExprResult InitializationSequence::Perform(Sema &S, | ||||
7988 | const InitializedEntity &Entity, | ||||
7989 | const InitializationKind &Kind, | ||||
7990 | MultiExprArg Args, | ||||
7991 | QualType *ResultType) { | ||||
7992 | if (Failed()) { | ||||
7993 | Diagnose(S, Entity, Kind, Args); | ||||
7994 | return ExprError(); | ||||
7995 | } | ||||
7996 | if (!ZeroInitializationFixit.empty()) { | ||||
7997 | unsigned DiagID = diag::err_default_init_const; | ||||
7998 | if (Decl *D = Entity.getDecl()) | ||||
7999 | if (S.getLangOpts().MSVCCompat && D->hasAttr<SelectAnyAttr>()) | ||||
8000 | DiagID = diag::ext_default_init_const; | ||||
8001 | |||||
8002 | // The initialization would have succeeded with this fixit. Since the fixit | ||||
8003 | // is on the error, we need to build a valid AST in this case, so this isn't | ||||
8004 | // handled in the Failed() branch above. | ||||
8005 | QualType DestType = Entity.getType(); | ||||
8006 | S.Diag(Kind.getLocation(), DiagID) | ||||
8007 | << DestType << (bool)DestType->getAs<RecordType>() | ||||
8008 | << FixItHint::CreateInsertion(ZeroInitializationFixitLoc, | ||||
8009 | ZeroInitializationFixit); | ||||
8010 | } | ||||
8011 | |||||
8012 | if (getKind() == DependentSequence) { | ||||
8013 | // If the declaration is a non-dependent, incomplete array type | ||||
8014 | // that has an initializer, then its type will be completed once | ||||
8015 | // the initializer is instantiated. | ||||
8016 | if (ResultType && !Entity.getType()->isDependentType() && | ||||
8017 | Args.size() == 1) { | ||||
8018 | QualType DeclType = Entity.getType(); | ||||
8019 | if (const IncompleteArrayType *ArrayT | ||||
8020 | = S.Context.getAsIncompleteArrayType(DeclType)) { | ||||
8021 | // FIXME: We don't currently have the ability to accurately | ||||
8022 | // compute the length of an initializer list without | ||||
8023 | // performing full type-checking of the initializer list | ||||
8024 | // (since we have to determine where braces are implicitly | ||||
8025 | // introduced and such). So, we fall back to making the array | ||||
8026 | // type a dependently-sized array type with no specified | ||||
8027 | // bound. | ||||
8028 | if (isa<InitListExpr>((Expr *)Args[0])) { | ||||
8029 | SourceRange Brackets; | ||||
8030 | |||||
8031 | // Scavange the location of the brackets from the entity, if we can. | ||||
8032 | if (auto *DD = dyn_cast_or_null<DeclaratorDecl>(Entity.getDecl())) { | ||||
8033 | if (TypeSourceInfo *TInfo = DD->getTypeSourceInfo()) { | ||||
8034 | TypeLoc TL = TInfo->getTypeLoc(); | ||||
8035 | if (IncompleteArrayTypeLoc ArrayLoc = | ||||
8036 | TL.getAs<IncompleteArrayTypeLoc>()) | ||||
8037 | Brackets = ArrayLoc.getBracketsRange(); | ||||
8038 | } | ||||
8039 | } | ||||
8040 | |||||
8041 | *ResultType | ||||
8042 | = S.Context.getDependentSizedArrayType(ArrayT->getElementType(), | ||||
8043 | /*NumElts=*/nullptr, | ||||
8044 | ArrayT->getSizeModifier(), | ||||
8045 | ArrayT->getIndexTypeCVRQualifiers(), | ||||
8046 | Brackets); | ||||
8047 | } | ||||
8048 | |||||
8049 | } | ||||
8050 | } | ||||
8051 | if (Kind.getKind() == InitializationKind::IK_Direct && | ||||
8052 | !Kind.isExplicitCast()) { | ||||
8053 | // Rebuild the ParenListExpr. | ||||
8054 | SourceRange ParenRange = Kind.getParenOrBraceRange(); | ||||
8055 | return S.ActOnParenListExpr(ParenRange.getBegin(), ParenRange.getEnd(), | ||||
8056 | Args); | ||||
8057 | } | ||||
8058 | assert(Kind.getKind() == InitializationKind::IK_Copy ||(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind ::IK_DirectList) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind::IK_DirectList" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8060, __extension__ __PRETTY_FUNCTION__)) | ||||
8059 | Kind.isExplicitCast() ||(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind ::IK_DirectList) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind::IK_DirectList" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8060, __extension__ __PRETTY_FUNCTION__)) | ||||
8060 | Kind.getKind() == InitializationKind::IK_DirectList)(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind ::IK_DirectList) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Copy || Kind.isExplicitCast() || Kind.getKind() == InitializationKind::IK_DirectList" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8060, __extension__ __PRETTY_FUNCTION__)); | ||||
8061 | return ExprResult(Args[0]); | ||||
8062 | } | ||||
8063 | |||||
8064 | // No steps means no initialization. | ||||
8065 | if (Steps.empty()) | ||||
8066 | return ExprResult((Expr *)nullptr); | ||||
8067 | |||||
8068 | if (S.getLangOpts().CPlusPlus11 && Entity.getType()->isReferenceType() && | ||||
8069 | Args.size() == 1 && isa<InitListExpr>(Args[0]) && | ||||
8070 | !Entity.isParamOrTemplateParamKind()) { | ||||
8071 | // Produce a C++98 compatibility warning if we are initializing a reference | ||||
8072 | // from an initializer list. For parameters, we produce a better warning | ||||
8073 | // elsewhere. | ||||
8074 | Expr *Init = Args[0]; | ||||
8075 | S.Diag(Init->getBeginLoc(), diag::warn_cxx98_compat_reference_list_init) | ||||
8076 | << Init->getSourceRange(); | ||||
8077 | } | ||||
8078 | |||||
8079 | // OpenCL v2.0 s6.13.11.1. atomic variables can be initialized in global scope | ||||
8080 | QualType ETy = Entity.getType(); | ||||
8081 | bool HasGlobalAS = ETy.hasAddressSpace() && | ||||
8082 | ETy.getAddressSpace() == LangAS::opencl_global; | ||||
8083 | |||||
8084 | if (S.getLangOpts().OpenCLVersion >= 200 && | ||||
8085 | ETy->isAtomicType() && !HasGlobalAS && | ||||
8086 | Entity.getKind() == InitializedEntity::EK_Variable && Args.size() > 0) { | ||||
8087 | S.Diag(Args[0]->getBeginLoc(), diag::err_opencl_atomic_init) | ||||
8088 | << 1 | ||||
8089 | << SourceRange(Entity.getDecl()->getBeginLoc(), Args[0]->getEndLoc()); | ||||
8090 | return ExprError(); | ||||
8091 | } | ||||
8092 | |||||
8093 | QualType DestType = Entity.getType().getNonReferenceType(); | ||||
8094 | // FIXME: Ugly hack around the fact that Entity.getType() is not | ||||
8095 | // the same as Entity.getDecl()->getType() in cases involving type merging, | ||||
8096 | // and we want latter when it makes sense. | ||||
8097 | if (ResultType) | ||||
8098 | *ResultType = Entity.getDecl() ? Entity.getDecl()->getType() : | ||||
8099 | Entity.getType(); | ||||
8100 | |||||
8101 | ExprResult CurInit((Expr *)nullptr); | ||||
8102 | SmallVector<Expr*, 4> ArrayLoopCommonExprs; | ||||
8103 | |||||
8104 | // For initialization steps that start with a single initializer, | ||||
8105 | // grab the only argument out the Args and place it into the "current" | ||||
8106 | // initializer. | ||||
8107 | switch (Steps.front().Kind) { | ||||
8108 | case SK_ResolveAddressOfOverloadedFunction: | ||||
8109 | case SK_CastDerivedToBasePRValue: | ||||
8110 | case SK_CastDerivedToBaseXValue: | ||||
8111 | case SK_CastDerivedToBaseLValue: | ||||
8112 | case SK_BindReference: | ||||
8113 | case SK_BindReferenceToTemporary: | ||||
8114 | case SK_FinalCopy: | ||||
8115 | case SK_ExtraneousCopyToTemporary: | ||||
8116 | case SK_UserConversion: | ||||
8117 | case SK_QualificationConversionLValue: | ||||
8118 | case SK_QualificationConversionXValue: | ||||
8119 | case SK_QualificationConversionPRValue: | ||||
8120 | case SK_FunctionReferenceConversion: | ||||
8121 | case SK_AtomicConversion: | ||||
8122 | case SK_ConversionSequence: | ||||
8123 | case SK_ConversionSequenceNoNarrowing: | ||||
8124 | case SK_ListInitialization: | ||||
8125 | case SK_UnwrapInitList: | ||||
8126 | case SK_RewrapInitList: | ||||
8127 | case SK_CAssignment: | ||||
8128 | case SK_StringInit: | ||||
8129 | case SK_ObjCObjectConversion: | ||||
8130 | case SK_ArrayLoopIndex: | ||||
8131 | case SK_ArrayLoopInit: | ||||
8132 | case SK_ArrayInit: | ||||
8133 | case SK_GNUArrayInit: | ||||
8134 | case SK_ParenthesizedArrayInit: | ||||
8135 | case SK_PassByIndirectCopyRestore: | ||||
8136 | case SK_PassByIndirectRestore: | ||||
8137 | case SK_ProduceObjCObject: | ||||
8138 | case SK_StdInitializerList: | ||||
8139 | case SK_OCLSamplerInit: | ||||
8140 | case SK_OCLZeroOpaqueType: { | ||||
8141 | assert(Args.size() == 1)(static_cast <bool> (Args.size() == 1) ? void (0) : __assert_fail ("Args.size() == 1", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8141, __extension__ __PRETTY_FUNCTION__)); | ||||
8142 | CurInit = Args[0]; | ||||
8143 | if (!CurInit.get()) return ExprError(); | ||||
8144 | break; | ||||
8145 | } | ||||
8146 | |||||
8147 | case SK_ConstructorInitialization: | ||||
8148 | case SK_ConstructorInitializationFromList: | ||||
8149 | case SK_StdInitializerListConstructorCall: | ||||
8150 | case SK_ZeroInitialization: | ||||
8151 | break; | ||||
8152 | } | ||||
8153 | |||||
8154 | // Promote from an unevaluated context to an unevaluated list context in | ||||
8155 | // C++11 list-initialization; we need to instantiate entities usable in | ||||
8156 | // constant expressions here in order to perform narrowing checks =( | ||||
8157 | EnterExpressionEvaluationContext Evaluated( | ||||
8158 | S, EnterExpressionEvaluationContext::InitList, | ||||
8159 | CurInit.get() && isa<InitListExpr>(CurInit.get())); | ||||
8160 | |||||
8161 | // C++ [class.abstract]p2: | ||||
8162 | // no objects of an abstract class can be created except as subobjects | ||||
8163 | // of a class derived from it | ||||
8164 | auto checkAbstractType = [&](QualType T) -> bool { | ||||
8165 | if (Entity.getKind() == InitializedEntity::EK_Base || | ||||
8166 | Entity.getKind() == InitializedEntity::EK_Delegating) | ||||
8167 | return false; | ||||
8168 | return S.RequireNonAbstractType(Kind.getLocation(), T, | ||||
8169 | diag::err_allocation_of_abstract_type); | ||||
8170 | }; | ||||
8171 | |||||
8172 | // Walk through the computed steps for the initialization sequence, | ||||
8173 | // performing the specified conversions along the way. | ||||
8174 | bool ConstructorInitRequiresZeroInit = false; | ||||
8175 | for (step_iterator Step = step_begin(), StepEnd = step_end(); | ||||
8176 | Step != StepEnd; ++Step) { | ||||
8177 | if (CurInit.isInvalid()) | ||||
8178 | return ExprError(); | ||||
8179 | |||||
8180 | QualType SourceType = CurInit.get() ? CurInit.get()->getType() : QualType(); | ||||
8181 | |||||
8182 | switch (Step->Kind) { | ||||
8183 | case SK_ResolveAddressOfOverloadedFunction: | ||||
8184 | // Overload resolution determined which function invoke; update the | ||||
8185 | // initializer to reflect that choice. | ||||
8186 | S.CheckAddressOfMemberAccess(CurInit.get(), Step->Function.FoundDecl); | ||||
8187 | if (S.DiagnoseUseOfDecl(Step->Function.FoundDecl, Kind.getLocation())) | ||||
8188 | return ExprError(); | ||||
8189 | CurInit = S.FixOverloadedFunctionReference(CurInit, | ||||
8190 | Step->Function.FoundDecl, | ||||
8191 | Step->Function.Function); | ||||
8192 | break; | ||||
8193 | |||||
8194 | case SK_CastDerivedToBasePRValue: | ||||
8195 | case SK_CastDerivedToBaseXValue: | ||||
8196 | case SK_CastDerivedToBaseLValue: { | ||||
8197 | // We have a derived-to-base cast that produces either an rvalue or an | ||||
8198 | // lvalue. Perform that cast. | ||||
8199 | |||||
8200 | CXXCastPath BasePath; | ||||
8201 | |||||
8202 | // Casts to inaccessible base classes are allowed with C-style casts. | ||||
8203 | bool IgnoreBaseAccess = Kind.isCStyleOrFunctionalCast(); | ||||
8204 | if (S.CheckDerivedToBaseConversion( | ||||
8205 | SourceType, Step->Type, CurInit.get()->getBeginLoc(), | ||||
8206 | CurInit.get()->getSourceRange(), &BasePath, IgnoreBaseAccess)) | ||||
8207 | return ExprError(); | ||||
8208 | |||||
8209 | ExprValueKind VK = | ||||
8210 | Step->Kind == SK_CastDerivedToBaseLValue | ||||
8211 | ? VK_LValue | ||||
8212 | : (Step->Kind == SK_CastDerivedToBaseXValue ? VK_XValue | ||||
8213 | : VK_PRValue); | ||||
8214 | CurInit = ImplicitCastExpr::Create(S.Context, Step->Type, | ||||
8215 | CK_DerivedToBase, CurInit.get(), | ||||
8216 | &BasePath, VK, FPOptionsOverride()); | ||||
8217 | break; | ||||
8218 | } | ||||
8219 | |||||
8220 | case SK_BindReference: | ||||
8221 | // Reference binding does not have any corresponding ASTs. | ||||
8222 | |||||
8223 | // Check exception specifications | ||||
8224 | if (S.CheckExceptionSpecCompatibility(CurInit.get(), DestType)) | ||||
8225 | return ExprError(); | ||||
8226 | |||||
8227 | // We don't check for e.g. function pointers here, since address | ||||
8228 | // availability checks should only occur when the function first decays | ||||
8229 | // into a pointer or reference. | ||||
8230 | if (CurInit.get()->getType()->isFunctionProtoType()) { | ||||
8231 | if (auto *DRE = dyn_cast<DeclRefExpr>(CurInit.get()->IgnoreParens())) { | ||||
8232 | if (auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl())) { | ||||
8233 | if (!S.checkAddressOfFunctionIsAvailable(FD, /*Complain=*/true, | ||||
8234 | DRE->getBeginLoc())) | ||||
8235 | return ExprError(); | ||||
8236 | } | ||||
8237 | } | ||||
8238 | } | ||||
8239 | |||||
8240 | CheckForNullPointerDereference(S, CurInit.get()); | ||||
8241 | break; | ||||
8242 | |||||
8243 | case SK_BindReferenceToTemporary: { | ||||
8244 | // Make sure the "temporary" is actually an rvalue. | ||||
8245 | assert(CurInit.get()->isPRValue() && "not a temporary")(static_cast <bool> (CurInit.get()->isPRValue() && "not a temporary") ? void (0) : __assert_fail ("CurInit.get()->isPRValue() && \"not a temporary\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8245, __extension__ __PRETTY_FUNCTION__)); | ||||
8246 | |||||
8247 | // Check exception specifications | ||||
8248 | if (S.CheckExceptionSpecCompatibility(CurInit.get(), DestType)) | ||||
8249 | return ExprError(); | ||||
8250 | |||||
8251 | QualType MTETy = Step->Type; | ||||
8252 | |||||
8253 | // When this is an incomplete array type (such as when this is | ||||
8254 | // initializing an array of unknown bounds from an init list), use THAT | ||||
8255 | // type instead so that we propogate the array bounds. | ||||
8256 | if (MTETy->isIncompleteArrayType() && | ||||
8257 | !CurInit.get()->getType()->isIncompleteArrayType() && | ||||
8258 | S.Context.hasSameType( | ||||
8259 | MTETy->getPointeeOrArrayElementType(), | ||||
8260 | CurInit.get()->getType()->getPointeeOrArrayElementType())) | ||||
8261 | MTETy = CurInit.get()->getType(); | ||||
8262 | |||||
8263 | // Materialize the temporary into memory. | ||||
8264 | MaterializeTemporaryExpr *MTE = S.CreateMaterializeTemporaryExpr( | ||||
8265 | MTETy, CurInit.get(), Entity.getType()->isLValueReferenceType()); | ||||
8266 | CurInit = MTE; | ||||
8267 | |||||
8268 | // If we're extending this temporary to automatic storage duration -- we | ||||
8269 | // need to register its cleanup during the full-expression's cleanups. | ||||
8270 | if (MTE->getStorageDuration() == SD_Automatic && | ||||
8271 | MTE->getType().isDestructedType()) | ||||
8272 | S.Cleanup.setExprNeedsCleanups(true); | ||||
8273 | break; | ||||
8274 | } | ||||
8275 | |||||
8276 | case SK_FinalCopy: | ||||
8277 | if (checkAbstractType(Step->Type)) | ||||
8278 | return ExprError(); | ||||
8279 | |||||
8280 | // If the overall initialization is initializing a temporary, we already | ||||
8281 | // bound our argument if it was necessary to do so. If not (if we're | ||||
8282 | // ultimately initializing a non-temporary), our argument needs to be | ||||
8283 | // bound since it's initializing a function parameter. | ||||
8284 | // FIXME: This is a mess. Rationalize temporary destruction. | ||||
8285 | if (!shouldBindAsTemporary(Entity)) | ||||
8286 | CurInit = S.MaybeBindToTemporary(CurInit.get()); | ||||
8287 | CurInit = CopyObject(S, Step->Type, Entity, CurInit, | ||||
8288 | /*IsExtraneousCopy=*/false); | ||||
8289 | break; | ||||
8290 | |||||
8291 | case SK_ExtraneousCopyToTemporary: | ||||
8292 | CurInit = CopyObject(S, Step->Type, Entity, CurInit, | ||||
8293 | /*IsExtraneousCopy=*/true); | ||||
8294 | break; | ||||
8295 | |||||
8296 | case SK_UserConversion: { | ||||
8297 | // We have a user-defined conversion that invokes either a constructor | ||||
8298 | // or a conversion function. | ||||
8299 | CastKind CastKind; | ||||
8300 | FunctionDecl *Fn = Step->Function.Function; | ||||
8301 | DeclAccessPair FoundFn = Step->Function.FoundDecl; | ||||
8302 | bool HadMultipleCandidates = Step->Function.HadMultipleCandidates; | ||||
8303 | bool CreatedObject = false; | ||||
8304 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Fn)) { | ||||
8305 | // Build a call to the selected constructor. | ||||
8306 | SmallVector<Expr*, 8> ConstructorArgs; | ||||
8307 | SourceLocation Loc = CurInit.get()->getBeginLoc(); | ||||
8308 | |||||
8309 | // Determine the arguments required to actually perform the constructor | ||||
8310 | // call. | ||||
8311 | Expr *Arg = CurInit.get(); | ||||
8312 | if (S.CompleteConstructorCall(Constructor, Step->Type, | ||||
8313 | MultiExprArg(&Arg, 1), Loc, | ||||
8314 | ConstructorArgs)) | ||||
8315 | return ExprError(); | ||||
8316 | |||||
8317 | // Build an expression that constructs a temporary. | ||||
8318 | CurInit = S.BuildCXXConstructExpr(Loc, Step->Type, | ||||
8319 | FoundFn, Constructor, | ||||
8320 | ConstructorArgs, | ||||
8321 | HadMultipleCandidates, | ||||
8322 | /*ListInit*/ false, | ||||
8323 | /*StdInitListInit*/ false, | ||||
8324 | /*ZeroInit*/ false, | ||||
8325 | CXXConstructExpr::CK_Complete, | ||||
8326 | SourceRange()); | ||||
8327 | if (CurInit.isInvalid()) | ||||
8328 | return ExprError(); | ||||
8329 | |||||
8330 | S.CheckConstructorAccess(Kind.getLocation(), Constructor, FoundFn, | ||||
8331 | Entity); | ||||
8332 | if (S.DiagnoseUseOfDecl(FoundFn, Kind.getLocation())) | ||||
8333 | return ExprError(); | ||||
8334 | |||||
8335 | CastKind = CK_ConstructorConversion; | ||||
8336 | CreatedObject = true; | ||||
8337 | } else { | ||||
8338 | // Build a call to the conversion function. | ||||
8339 | CXXConversionDecl *Conversion = cast<CXXConversionDecl>(Fn); | ||||
8340 | S.CheckMemberOperatorAccess(Kind.getLocation(), CurInit.get(), nullptr, | ||||
8341 | FoundFn); | ||||
8342 | if (S.DiagnoseUseOfDecl(FoundFn, Kind.getLocation())) | ||||
8343 | return ExprError(); | ||||
8344 | |||||
8345 | CurInit = S.BuildCXXMemberCallExpr(CurInit.get(), FoundFn, Conversion, | ||||
8346 | HadMultipleCandidates); | ||||
8347 | if (CurInit.isInvalid()) | ||||
8348 | return ExprError(); | ||||
8349 | |||||
8350 | CastKind = CK_UserDefinedConversion; | ||||
8351 | CreatedObject = Conversion->getReturnType()->isRecordType(); | ||||
8352 | } | ||||
8353 | |||||
8354 | if (CreatedObject && checkAbstractType(CurInit.get()->getType())) | ||||
8355 | return ExprError(); | ||||
8356 | |||||
8357 | CurInit = ImplicitCastExpr::Create( | ||||
8358 | S.Context, CurInit.get()->getType(), CastKind, CurInit.get(), nullptr, | ||||
8359 | CurInit.get()->getValueKind(), S.CurFPFeatureOverrides()); | ||||
8360 | |||||
8361 | if (shouldBindAsTemporary(Entity)) | ||||
8362 | // The overall entity is temporary, so this expression should be | ||||
8363 | // destroyed at the end of its full-expression. | ||||
8364 | CurInit = S.MaybeBindToTemporary(CurInit.getAs<Expr>()); | ||||
8365 | else if (CreatedObject && shouldDestroyEntity(Entity)) { | ||||
8366 | // The object outlasts the full-expression, but we need to prepare for | ||||
8367 | // a destructor being run on it. | ||||
8368 | // FIXME: It makes no sense to do this here. This should happen | ||||
8369 | // regardless of how we initialized the entity. | ||||
8370 | QualType T = CurInit.get()->getType(); | ||||
8371 | if (const RecordType *Record = T->getAs<RecordType>()) { | ||||
8372 | CXXDestructorDecl *Destructor | ||||
8373 | = S.LookupDestructor(cast<CXXRecordDecl>(Record->getDecl())); | ||||
8374 | S.CheckDestructorAccess(CurInit.get()->getBeginLoc(), Destructor, | ||||
8375 | S.PDiag(diag::err_access_dtor_temp) << T); | ||||
8376 | S.MarkFunctionReferenced(CurInit.get()->getBeginLoc(), Destructor); | ||||
8377 | if (S.DiagnoseUseOfDecl(Destructor, CurInit.get()->getBeginLoc())) | ||||
8378 | return ExprError(); | ||||
8379 | } | ||||
8380 | } | ||||
8381 | break; | ||||
8382 | } | ||||
8383 | |||||
8384 | case SK_QualificationConversionLValue: | ||||
8385 | case SK_QualificationConversionXValue: | ||||
8386 | case SK_QualificationConversionPRValue: { | ||||
8387 | // Perform a qualification conversion; these can never go wrong. | ||||
8388 | ExprValueKind VK = | ||||
8389 | Step->Kind == SK_QualificationConversionLValue | ||||
8390 | ? VK_LValue | ||||
8391 | : (Step->Kind == SK_QualificationConversionXValue ? VK_XValue | ||||
8392 | : VK_PRValue); | ||||
8393 | CurInit = S.PerformQualificationConversion(CurInit.get(), Step->Type, VK); | ||||
8394 | break; | ||||
8395 | } | ||||
8396 | |||||
8397 | case SK_FunctionReferenceConversion: | ||||
8398 | assert(CurInit.get()->isLValue() &&(static_cast <bool> (CurInit.get()->isLValue() && "function reference should be lvalue") ? void (0) : __assert_fail ("CurInit.get()->isLValue() && \"function reference should be lvalue\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8399, __extension__ __PRETTY_FUNCTION__)) | ||||
8399 | "function reference should be lvalue")(static_cast <bool> (CurInit.get()->isLValue() && "function reference should be lvalue") ? void (0) : __assert_fail ("CurInit.get()->isLValue() && \"function reference should be lvalue\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8399, __extension__ __PRETTY_FUNCTION__)); | ||||
8400 | CurInit = | ||||
8401 | S.ImpCastExprToType(CurInit.get(), Step->Type, CK_NoOp, VK_LValue); | ||||
8402 | break; | ||||
8403 | |||||
8404 | case SK_AtomicConversion: { | ||||
8405 | assert(CurInit.get()->isPRValue() && "cannot convert glvalue to atomic")(static_cast <bool> (CurInit.get()->isPRValue() && "cannot convert glvalue to atomic") ? void (0) : __assert_fail ("CurInit.get()->isPRValue() && \"cannot convert glvalue to atomic\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8405, __extension__ __PRETTY_FUNCTION__)); | ||||
8406 | CurInit = S.ImpCastExprToType(CurInit.get(), Step->Type, | ||||
8407 | CK_NonAtomicToAtomic, VK_PRValue); | ||||
8408 | break; | ||||
8409 | } | ||||
8410 | |||||
8411 | case SK_ConversionSequence: | ||||
8412 | case SK_ConversionSequenceNoNarrowing: { | ||||
8413 | if (const auto *FromPtrType = | ||||
8414 | CurInit.get()->getType()->getAs<PointerType>()) { | ||||
8415 | if (const auto *ToPtrType = Step->Type->getAs<PointerType>()) { | ||||
8416 | if (FromPtrType->getPointeeType()->hasAttr(attr::NoDeref) && | ||||
8417 | !ToPtrType->getPointeeType()->hasAttr(attr::NoDeref)) { | ||||
8418 | // Do not check static casts here because they are checked earlier | ||||
8419 | // in Sema::ActOnCXXNamedCast() | ||||
8420 | if (!Kind.isStaticCast()) { | ||||
8421 | S.Diag(CurInit.get()->getExprLoc(), | ||||
8422 | diag::warn_noderef_to_dereferenceable_pointer) | ||||
8423 | << CurInit.get()->getSourceRange(); | ||||
8424 | } | ||||
8425 | } | ||||
8426 | } | ||||
8427 | } | ||||
8428 | |||||
8429 | Sema::CheckedConversionKind CCK | ||||
8430 | = Kind.isCStyleCast()? Sema::CCK_CStyleCast | ||||
8431 | : Kind.isFunctionalCast()? Sema::CCK_FunctionalCast | ||||
8432 | : Kind.isExplicitCast()? Sema::CCK_OtherCast | ||||
8433 | : Sema::CCK_ImplicitConversion; | ||||
8434 | ExprResult CurInitExprRes = | ||||
8435 | S.PerformImplicitConversion(CurInit.get(), Step->Type, *Step->ICS, | ||||
8436 | getAssignmentAction(Entity), CCK); | ||||
8437 | if (CurInitExprRes.isInvalid()) | ||||
8438 | return ExprError(); | ||||
8439 | |||||
8440 | S.DiscardMisalignedMemberAddress(Step->Type.getTypePtr(), CurInit.get()); | ||||
8441 | |||||
8442 | CurInit = CurInitExprRes; | ||||
8443 | |||||
8444 | if (Step->Kind == SK_ConversionSequenceNoNarrowing && | ||||
8445 | S.getLangOpts().CPlusPlus) | ||||
8446 | DiagnoseNarrowingInInitList(S, *Step->ICS, SourceType, Entity.getType(), | ||||
8447 | CurInit.get()); | ||||
8448 | |||||
8449 | break; | ||||
8450 | } | ||||
8451 | |||||
8452 | case SK_ListInitialization: { | ||||
8453 | if (checkAbstractType(Step->Type)) | ||||
8454 | return ExprError(); | ||||
8455 | |||||
8456 | InitListExpr *InitList = cast<InitListExpr>(CurInit.get()); | ||||
8457 | // If we're not initializing the top-level entity, we need to create an | ||||
8458 | // InitializeTemporary entity for our target type. | ||||
8459 | QualType Ty = Step->Type; | ||||
8460 | bool IsTemporary = !S.Context.hasSameType(Entity.getType(), Ty); | ||||
8461 | InitializedEntity TempEntity = InitializedEntity::InitializeTemporary(Ty); | ||||
8462 | InitializedEntity InitEntity = IsTemporary ? TempEntity : Entity; | ||||
8463 | InitListChecker PerformInitList(S, InitEntity, | ||||
8464 | InitList, Ty, /*VerifyOnly=*/false, | ||||
8465 | /*TreatUnavailableAsInvalid=*/false); | ||||
8466 | if (PerformInitList.HadError()) | ||||
8467 | return ExprError(); | ||||
8468 | |||||
8469 | // Hack: We must update *ResultType if available in order to set the | ||||
8470 | // bounds of arrays, e.g. in 'int ar[] = {1, 2, 3};'. | ||||
8471 | // Worst case: 'const int (&arref)[] = {1, 2, 3};'. | ||||
8472 | if (ResultType && | ||||
8473 | ResultType->getNonReferenceType()->isIncompleteArrayType()) { | ||||
8474 | if ((*ResultType)->isRValueReferenceType()) | ||||
8475 | Ty = S.Context.getRValueReferenceType(Ty); | ||||
8476 | else if ((*ResultType)->isLValueReferenceType()) | ||||
8477 | Ty = S.Context.getLValueReferenceType(Ty, | ||||
8478 | (*ResultType)->castAs<LValueReferenceType>()->isSpelledAsLValue()); | ||||
8479 | *ResultType = Ty; | ||||
8480 | } | ||||
8481 | |||||
8482 | InitListExpr *StructuredInitList = | ||||
8483 | PerformInitList.getFullyStructuredList(); | ||||
8484 | CurInit.get(); | ||||
8485 | CurInit = shouldBindAsTemporary(InitEntity) | ||||
8486 | ? S.MaybeBindToTemporary(StructuredInitList) | ||||
8487 | : StructuredInitList; | ||||
8488 | break; | ||||
8489 | } | ||||
8490 | |||||
8491 | case SK_ConstructorInitializationFromList: { | ||||
8492 | if (checkAbstractType(Step->Type)) | ||||
8493 | return ExprError(); | ||||
8494 | |||||
8495 | // When an initializer list is passed for a parameter of type "reference | ||||
8496 | // to object", we don't get an EK_Temporary entity, but instead an | ||||
8497 | // EK_Parameter entity with reference type. | ||||
8498 | // FIXME: This is a hack. What we really should do is create a user | ||||
8499 | // conversion step for this case, but this makes it considerably more | ||||
8500 | // complicated. For now, this will do. | ||||
8501 | InitializedEntity TempEntity = InitializedEntity::InitializeTemporary( | ||||
8502 | Entity.getType().getNonReferenceType()); | ||||
8503 | bool UseTemporary = Entity.getType()->isReferenceType(); | ||||
8504 | assert(Args.size() == 1 && "expected a single argument for list init")(static_cast <bool> (Args.size() == 1 && "expected a single argument for list init" ) ? void (0) : __assert_fail ("Args.size() == 1 && \"expected a single argument for list init\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8504, __extension__ __PRETTY_FUNCTION__)); | ||||
8505 | InitListExpr *InitList = cast<InitListExpr>(Args[0]); | ||||
8506 | S.Diag(InitList->getExprLoc(), diag::warn_cxx98_compat_ctor_list_init) | ||||
8507 | << InitList->getSourceRange(); | ||||
8508 | MultiExprArg Arg(InitList->getInits(), InitList->getNumInits()); | ||||
8509 | CurInit = PerformConstructorInitialization(S, UseTemporary ? TempEntity : | ||||
8510 | Entity, | ||||
8511 | Kind, Arg, *Step, | ||||
8512 | ConstructorInitRequiresZeroInit, | ||||
8513 | /*IsListInitialization*/true, | ||||
8514 | /*IsStdInitListInit*/false, | ||||
8515 | InitList->getLBraceLoc(), | ||||
8516 | InitList->getRBraceLoc()); | ||||
8517 | break; | ||||
8518 | } | ||||
8519 | |||||
8520 | case SK_UnwrapInitList: | ||||
8521 | CurInit = cast<InitListExpr>(CurInit.get())->getInit(0); | ||||
8522 | break; | ||||
8523 | |||||
8524 | case SK_RewrapInitList: { | ||||
8525 | Expr *E = CurInit.get(); | ||||
8526 | InitListExpr *Syntactic = Step->WrappingSyntacticList; | ||||
8527 | InitListExpr *ILE = new (S.Context) InitListExpr(S.Context, | ||||
8528 | Syntactic->getLBraceLoc(), E, Syntactic->getRBraceLoc()); | ||||
8529 | ILE->setSyntacticForm(Syntactic); | ||||
8530 | ILE->setType(E->getType()); | ||||
8531 | ILE->setValueKind(E->getValueKind()); | ||||
8532 | CurInit = ILE; | ||||
8533 | break; | ||||
8534 | } | ||||
8535 | |||||
8536 | case SK_ConstructorInitialization: | ||||
8537 | case SK_StdInitializerListConstructorCall: { | ||||
8538 | if (checkAbstractType(Step->Type)) | ||||
8539 | return ExprError(); | ||||
8540 | |||||
8541 | // When an initializer list is passed for a parameter of type "reference | ||||
8542 | // to object", we don't get an EK_Temporary entity, but instead an | ||||
8543 | // EK_Parameter entity with reference type. | ||||
8544 | // FIXME: This is a hack. What we really should do is create a user | ||||
8545 | // conversion step for this case, but this makes it considerably more | ||||
8546 | // complicated. For now, this will do. | ||||
8547 | InitializedEntity TempEntity = InitializedEntity::InitializeTemporary( | ||||
8548 | Entity.getType().getNonReferenceType()); | ||||
8549 | bool UseTemporary = Entity.getType()->isReferenceType(); | ||||
8550 | bool IsStdInitListInit = | ||||
8551 | Step->Kind == SK_StdInitializerListConstructorCall; | ||||
8552 | Expr *Source = CurInit.get(); | ||||
8553 | SourceRange Range = Kind.hasParenOrBraceRange() | ||||
8554 | ? Kind.getParenOrBraceRange() | ||||
8555 | : SourceRange(); | ||||
8556 | CurInit = PerformConstructorInitialization( | ||||
8557 | S, UseTemporary ? TempEntity : Entity, Kind, | ||||
8558 | Source ? MultiExprArg(Source) : Args, *Step, | ||||
8559 | ConstructorInitRequiresZeroInit, | ||||
8560 | /*IsListInitialization*/ IsStdInitListInit, | ||||
8561 | /*IsStdInitListInitialization*/ IsStdInitListInit, | ||||
8562 | /*LBraceLoc*/ Range.getBegin(), | ||||
8563 | /*RBraceLoc*/ Range.getEnd()); | ||||
8564 | break; | ||||
8565 | } | ||||
8566 | |||||
8567 | case SK_ZeroInitialization: { | ||||
8568 | step_iterator NextStep = Step; | ||||
8569 | ++NextStep; | ||||
8570 | if (NextStep != StepEnd && | ||||
8571 | (NextStep->Kind == SK_ConstructorInitialization || | ||||
8572 | NextStep->Kind == SK_ConstructorInitializationFromList)) { | ||||
8573 | // The need for zero-initialization is recorded directly into | ||||
8574 | // the call to the object's constructor within the next step. | ||||
8575 | ConstructorInitRequiresZeroInit = true; | ||||
8576 | } else if (Kind.getKind() == InitializationKind::IK_Value && | ||||
8577 | S.getLangOpts().CPlusPlus && | ||||
8578 | !Kind.isImplicitValueInit()) { | ||||
8579 | TypeSourceInfo *TSInfo = Entity.getTypeSourceInfo(); | ||||
8580 | if (!TSInfo) | ||||
8581 | TSInfo = S.Context.getTrivialTypeSourceInfo(Step->Type, | ||||
8582 | Kind.getRange().getBegin()); | ||||
8583 | |||||
8584 | CurInit = new (S.Context) CXXScalarValueInitExpr( | ||||
8585 | Entity.getType().getNonLValueExprType(S.Context), TSInfo, | ||||
8586 | Kind.getRange().getEnd()); | ||||
8587 | } else { | ||||
8588 | CurInit = new (S.Context) ImplicitValueInitExpr(Step->Type); | ||||
8589 | } | ||||
8590 | break; | ||||
8591 | } | ||||
8592 | |||||
8593 | case SK_CAssignment: { | ||||
8594 | QualType SourceType = CurInit.get()->getType(); | ||||
8595 | |||||
8596 | // Save off the initial CurInit in case we need to emit a diagnostic | ||||
8597 | ExprResult InitialCurInit = CurInit; | ||||
8598 | ExprResult Result = CurInit; | ||||
8599 | Sema::AssignConvertType ConvTy = | ||||
8600 | S.CheckSingleAssignmentConstraints(Step->Type, Result, true, | ||||
8601 | Entity.getKind() == InitializedEntity::EK_Parameter_CF_Audited); | ||||
8602 | if (Result.isInvalid()) | ||||
8603 | return ExprError(); | ||||
8604 | CurInit = Result; | ||||
8605 | |||||
8606 | // If this is a call, allow conversion to a transparent union. | ||||
8607 | ExprResult CurInitExprRes = CurInit; | ||||
8608 | if (ConvTy != Sema::Compatible && | ||||
8609 | Entity.isParameterKind() && | ||||
8610 | S.CheckTransparentUnionArgumentConstraints(Step->Type, CurInitExprRes) | ||||
8611 | == Sema::Compatible) | ||||
8612 | ConvTy = Sema::Compatible; | ||||
8613 | if (CurInitExprRes.isInvalid()) | ||||
8614 | return ExprError(); | ||||
8615 | CurInit = CurInitExprRes; | ||||
8616 | |||||
8617 | bool Complained; | ||||
8618 | if (S.DiagnoseAssignmentResult(ConvTy, Kind.getLocation(), | ||||
8619 | Step->Type, SourceType, | ||||
8620 | InitialCurInit.get(), | ||||
8621 | getAssignmentAction(Entity, true), | ||||
8622 | &Complained)) { | ||||
8623 | PrintInitLocationNote(S, Entity); | ||||
8624 | return ExprError(); | ||||
8625 | } else if (Complained) | ||||
8626 | PrintInitLocationNote(S, Entity); | ||||
8627 | break; | ||||
8628 | } | ||||
8629 | |||||
8630 | case SK_StringInit: { | ||||
8631 | QualType Ty = Step->Type; | ||||
8632 | bool UpdateType = ResultType && Entity.getType()->isIncompleteArrayType(); | ||||
8633 | CheckStringInit(CurInit.get(), UpdateType ? *ResultType : Ty, | ||||
8634 | S.Context.getAsArrayType(Ty), S); | ||||
8635 | break; | ||||
8636 | } | ||||
8637 | |||||
8638 | case SK_ObjCObjectConversion: | ||||
8639 | CurInit = S.ImpCastExprToType(CurInit.get(), Step->Type, | ||||
8640 | CK_ObjCObjectLValueCast, | ||||
8641 | CurInit.get()->getValueKind()); | ||||
8642 | break; | ||||
8643 | |||||
8644 | case SK_ArrayLoopIndex: { | ||||
8645 | Expr *Cur = CurInit.get(); | ||||
8646 | Expr *BaseExpr = new (S.Context) | ||||
8647 | OpaqueValueExpr(Cur->getExprLoc(), Cur->getType(), | ||||
8648 | Cur->getValueKind(), Cur->getObjectKind(), Cur); | ||||
8649 | Expr *IndexExpr = | ||||
8650 | new (S.Context) ArrayInitIndexExpr(S.Context.getSizeType()); | ||||
8651 | CurInit = S.CreateBuiltinArraySubscriptExpr( | ||||
8652 | BaseExpr, Kind.getLocation(), IndexExpr, Kind.getLocation()); | ||||
8653 | ArrayLoopCommonExprs.push_back(BaseExpr); | ||||
8654 | break; | ||||
8655 | } | ||||
8656 | |||||
8657 | case SK_ArrayLoopInit: { | ||||
8658 | assert(!ArrayLoopCommonExprs.empty() &&(static_cast <bool> (!ArrayLoopCommonExprs.empty() && "mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit") ? void ( 0) : __assert_fail ("!ArrayLoopCommonExprs.empty() && \"mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8659, __extension__ __PRETTY_FUNCTION__)) | ||||
8659 | "mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit")(static_cast <bool> (!ArrayLoopCommonExprs.empty() && "mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit") ? void ( 0) : __assert_fail ("!ArrayLoopCommonExprs.empty() && \"mismatched SK_ArrayLoopIndex and SK_ArrayLoopInit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8659, __extension__ __PRETTY_FUNCTION__)); | ||||
8660 | Expr *Common = ArrayLoopCommonExprs.pop_back_val(); | ||||
8661 | CurInit = new (S.Context) ArrayInitLoopExpr(Step->Type, Common, | ||||
8662 | CurInit.get()); | ||||
8663 | break; | ||||
8664 | } | ||||
8665 | |||||
8666 | case SK_GNUArrayInit: | ||||
8667 | // Okay: we checked everything before creating this step. Note that | ||||
8668 | // this is a GNU extension. | ||||
8669 | S.Diag(Kind.getLocation(), diag::ext_array_init_copy) | ||||
8670 | << Step->Type << CurInit.get()->getType() | ||||
8671 | << CurInit.get()->getSourceRange(); | ||||
8672 | updateGNUCompoundLiteralRValue(CurInit.get()); | ||||
8673 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
8674 | case SK_ArrayInit: | ||||
8675 | // If the destination type is an incomplete array type, update the | ||||
8676 | // type accordingly. | ||||
8677 | if (ResultType) { | ||||
8678 | if (const IncompleteArrayType *IncompleteDest | ||||
8679 | = S.Context.getAsIncompleteArrayType(Step->Type)) { | ||||
8680 | if (const ConstantArrayType *ConstantSource | ||||
8681 | = S.Context.getAsConstantArrayType(CurInit.get()->getType())) { | ||||
8682 | *ResultType = S.Context.getConstantArrayType( | ||||
8683 | IncompleteDest->getElementType(), | ||||
8684 | ConstantSource->getSize(), | ||||
8685 | ConstantSource->getSizeExpr(), | ||||
8686 | ArrayType::Normal, 0); | ||||
8687 | } | ||||
8688 | } | ||||
8689 | } | ||||
8690 | break; | ||||
8691 | |||||
8692 | case SK_ParenthesizedArrayInit: | ||||
8693 | // Okay: we checked everything before creating this step. Note that | ||||
8694 | // this is a GNU extension. | ||||
8695 | S.Diag(Kind.getLocation(), diag::ext_array_init_parens) | ||||
8696 | << CurInit.get()->getSourceRange(); | ||||
8697 | break; | ||||
8698 | |||||
8699 | case SK_PassByIndirectCopyRestore: | ||||
8700 | case SK_PassByIndirectRestore: | ||||
8701 | checkIndirectCopyRestoreSource(S, CurInit.get()); | ||||
8702 | CurInit = new (S.Context) ObjCIndirectCopyRestoreExpr( | ||||
8703 | CurInit.get(), Step->Type, | ||||
8704 | Step->Kind == SK_PassByIndirectCopyRestore); | ||||
8705 | break; | ||||
8706 | |||||
8707 | case SK_ProduceObjCObject: | ||||
8708 | CurInit = ImplicitCastExpr::Create( | ||||
8709 | S.Context, Step->Type, CK_ARCProduceObject, CurInit.get(), nullptr, | ||||
8710 | VK_PRValue, FPOptionsOverride()); | ||||
8711 | break; | ||||
8712 | |||||
8713 | case SK_StdInitializerList: { | ||||
8714 | S.Diag(CurInit.get()->getExprLoc(), | ||||
8715 | diag::warn_cxx98_compat_initializer_list_init) | ||||
8716 | << CurInit.get()->getSourceRange(); | ||||
8717 | |||||
8718 | // Materialize the temporary into memory. | ||||
8719 | MaterializeTemporaryExpr *MTE = S.CreateMaterializeTemporaryExpr( | ||||
8720 | CurInit.get()->getType(), CurInit.get(), | ||||
8721 | /*BoundToLvalueReference=*/false); | ||||
8722 | |||||
8723 | // Wrap it in a construction of a std::initializer_list<T>. | ||||
8724 | CurInit = new (S.Context) CXXStdInitializerListExpr(Step->Type, MTE); | ||||
8725 | |||||
8726 | // Bind the result, in case the library has given initializer_list a | ||||
8727 | // non-trivial destructor. | ||||
8728 | if (shouldBindAsTemporary(Entity)) | ||||
8729 | CurInit = S.MaybeBindToTemporary(CurInit.get()); | ||||
8730 | break; | ||||
8731 | } | ||||
8732 | |||||
8733 | case SK_OCLSamplerInit: { | ||||
8734 | // Sampler initialization have 5 cases: | ||||
8735 | // 1. function argument passing | ||||
8736 | // 1a. argument is a file-scope variable | ||||
8737 | // 1b. argument is a function-scope variable | ||||
8738 | // 1c. argument is one of caller function's parameters | ||||
8739 | // 2. variable initialization | ||||
8740 | // 2a. initializing a file-scope variable | ||||
8741 | // 2b. initializing a function-scope variable | ||||
8742 | // | ||||
8743 | // For file-scope variables, since they cannot be initialized by function | ||||
8744 | // call of __translate_sampler_initializer in LLVM IR, their references | ||||
8745 | // need to be replaced by a cast from their literal initializers to | ||||
8746 | // sampler type. Since sampler variables can only be used in function | ||||
8747 | // calls as arguments, we only need to replace them when handling the | ||||
8748 | // argument passing. | ||||
8749 | assert(Step->Type->isSamplerT() &&(static_cast <bool> (Step->Type->isSamplerT() && "Sampler initialization on non-sampler type.") ? void (0) : __assert_fail ("Step->Type->isSamplerT() && \"Sampler initialization on non-sampler type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8750, __extension__ __PRETTY_FUNCTION__)) | ||||
8750 | "Sampler initialization on non-sampler type.")(static_cast <bool> (Step->Type->isSamplerT() && "Sampler initialization on non-sampler type.") ? void (0) : __assert_fail ("Step->Type->isSamplerT() && \"Sampler initialization on non-sampler type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8750, __extension__ __PRETTY_FUNCTION__)); | ||||
8751 | Expr *Init = CurInit.get()->IgnoreParens(); | ||||
8752 | QualType SourceType = Init->getType(); | ||||
8753 | // Case 1 | ||||
8754 | if (Entity.isParameterKind()) { | ||||
8755 | if (!SourceType->isSamplerT() && !SourceType->isIntegerType()) { | ||||
8756 | S.Diag(Kind.getLocation(), diag::err_sampler_argument_required) | ||||
8757 | << SourceType; | ||||
8758 | break; | ||||
8759 | } else if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Init)) { | ||||
8760 | auto Var = cast<VarDecl>(DRE->getDecl()); | ||||
8761 | // Case 1b and 1c | ||||
8762 | // No cast from integer to sampler is needed. | ||||
8763 | if (!Var->hasGlobalStorage()) { | ||||
8764 | CurInit = ImplicitCastExpr::Create( | ||||
8765 | S.Context, Step->Type, CK_LValueToRValue, Init, | ||||
8766 | /*BasePath=*/nullptr, VK_PRValue, FPOptionsOverride()); | ||||
8767 | break; | ||||
8768 | } | ||||
8769 | // Case 1a | ||||
8770 | // For function call with a file-scope sampler variable as argument, | ||||
8771 | // get the integer literal. | ||||
8772 | // Do not diagnose if the file-scope variable does not have initializer | ||||
8773 | // since this has already been diagnosed when parsing the variable | ||||
8774 | // declaration. | ||||
8775 | if (!Var->getInit() || !isa<ImplicitCastExpr>(Var->getInit())) | ||||
8776 | break; | ||||
8777 | Init = cast<ImplicitCastExpr>(const_cast<Expr*>( | ||||
8778 | Var->getInit()))->getSubExpr(); | ||||
8779 | SourceType = Init->getType(); | ||||
8780 | } | ||||
8781 | } else { | ||||
8782 | // Case 2 | ||||
8783 | // Check initializer is 32 bit integer constant. | ||||
8784 | // If the initializer is taken from global variable, do not diagnose since | ||||
8785 | // this has already been done when parsing the variable declaration. | ||||
8786 | if (!Init->isConstantInitializer(S.Context, false)) | ||||
8787 | break; | ||||
8788 | |||||
8789 | if (!SourceType->isIntegerType() || | ||||
8790 | 32 != S.Context.getIntWidth(SourceType)) { | ||||
8791 | S.Diag(Kind.getLocation(), diag::err_sampler_initializer_not_integer) | ||||
8792 | << SourceType; | ||||
8793 | break; | ||||
8794 | } | ||||
8795 | |||||
8796 | Expr::EvalResult EVResult; | ||||
8797 | Init->EvaluateAsInt(EVResult, S.Context); | ||||
8798 | llvm::APSInt Result = EVResult.Val.getInt(); | ||||
8799 | const uint64_t SamplerValue = Result.getLimitedValue(); | ||||
8800 | // 32-bit value of sampler's initializer is interpreted as | ||||
8801 | // bit-field with the following structure: | ||||
8802 | // |unspecified|Filter|Addressing Mode| Normalized Coords| | ||||
8803 | // |31 6|5 4|3 1| 0| | ||||
8804 | // This structure corresponds to enum values of sampler properties | ||||
8805 | // defined in SPIR spec v1.2 and also opencl-c.h | ||||
8806 | unsigned AddressingMode = (0x0E & SamplerValue) >> 1; | ||||
8807 | unsigned FilterMode = (0x30 & SamplerValue) >> 4; | ||||
8808 | if (FilterMode != 1 && FilterMode != 2 && | ||||
8809 | !S.getOpenCLOptions().isAvailableOption( | ||||
8810 | "cl_intel_device_side_avc_motion_estimation", S.getLangOpts())) | ||||
8811 | S.Diag(Kind.getLocation(), | ||||
8812 | diag::warn_sampler_initializer_invalid_bits) | ||||
8813 | << "Filter Mode"; | ||||
8814 | if (AddressingMode > 4) | ||||
8815 | S.Diag(Kind.getLocation(), | ||||
8816 | diag::warn_sampler_initializer_invalid_bits) | ||||
8817 | << "Addressing Mode"; | ||||
8818 | } | ||||
8819 | |||||
8820 | // Cases 1a, 2a and 2b | ||||
8821 | // Insert cast from integer to sampler. | ||||
8822 | CurInit = S.ImpCastExprToType(Init, S.Context.OCLSamplerTy, | ||||
8823 | CK_IntToOCLSampler); | ||||
8824 | break; | ||||
8825 | } | ||||
8826 | case SK_OCLZeroOpaqueType: { | ||||
8827 | assert((Step->Type->isEventT() || Step->Type->isQueueT() ||(static_cast <bool> ((Step->Type->isEventT() || Step ->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType ()) && "Wrong type for initialization of OpenCL opaque type." ) ? void (0) : __assert_fail ("(Step->Type->isEventT() || Step->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType()) && \"Wrong type for initialization of OpenCL opaque type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8829, __extension__ __PRETTY_FUNCTION__)) | ||||
8828 | Step->Type->isOCLIntelSubgroupAVCType()) &&(static_cast <bool> ((Step->Type->isEventT() || Step ->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType ()) && "Wrong type for initialization of OpenCL opaque type." ) ? void (0) : __assert_fail ("(Step->Type->isEventT() || Step->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType()) && \"Wrong type for initialization of OpenCL opaque type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8829, __extension__ __PRETTY_FUNCTION__)) | ||||
8829 | "Wrong type for initialization of OpenCL opaque type.")(static_cast <bool> ((Step->Type->isEventT() || Step ->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType ()) && "Wrong type for initialization of OpenCL opaque type." ) ? void (0) : __assert_fail ("(Step->Type->isEventT() || Step->Type->isQueueT() || Step->Type->isOCLIntelSubgroupAVCType()) && \"Wrong type for initialization of OpenCL opaque type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8829, __extension__ __PRETTY_FUNCTION__)); | ||||
8830 | |||||
8831 | CurInit = S.ImpCastExprToType(CurInit.get(), Step->Type, | ||||
8832 | CK_ZeroToOCLOpaqueType, | ||||
8833 | CurInit.get()->getValueKind()); | ||||
8834 | break; | ||||
8835 | } | ||||
8836 | } | ||||
8837 | } | ||||
8838 | |||||
8839 | // Check whether the initializer has a shorter lifetime than the initialized | ||||
8840 | // entity, and if not, either lifetime-extend or warn as appropriate. | ||||
8841 | if (auto *Init = CurInit.get()) | ||||
8842 | S.checkInitializerLifetime(Entity, Init); | ||||
8843 | |||||
8844 | // Diagnose non-fatal problems with the completed initialization. | ||||
8845 | if (Entity.getKind() == InitializedEntity::EK_Member && | ||||
8846 | cast<FieldDecl>(Entity.getDecl())->isBitField()) | ||||
8847 | S.CheckBitFieldInitialization(Kind.getLocation(), | ||||
8848 | cast<FieldDecl>(Entity.getDecl()), | ||||
8849 | CurInit.get()); | ||||
8850 | |||||
8851 | // Check for std::move on construction. | ||||
8852 | if (const Expr *E = CurInit.get()) { | ||||
8853 | CheckMoveOnConstruction(S, E, | ||||
8854 | Entity.getKind() == InitializedEntity::EK_Result); | ||||
8855 | } | ||||
8856 | |||||
8857 | return CurInit; | ||||
8858 | } | ||||
8859 | |||||
8860 | /// Somewhere within T there is an uninitialized reference subobject. | ||||
8861 | /// Dig it out and diagnose it. | ||||
8862 | static bool DiagnoseUninitializedReference(Sema &S, SourceLocation Loc, | ||||
8863 | QualType T) { | ||||
8864 | if (T->isReferenceType()) { | ||||
8865 | S.Diag(Loc, diag::err_reference_without_init) | ||||
8866 | << T.getNonReferenceType(); | ||||
8867 | return true; | ||||
8868 | } | ||||
8869 | |||||
8870 | CXXRecordDecl *RD = T->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); | ||||
8871 | if (!RD || !RD->hasUninitializedReferenceMember()) | ||||
8872 | return false; | ||||
8873 | |||||
8874 | for (const auto *FI : RD->fields()) { | ||||
8875 | if (FI->isUnnamedBitfield()) | ||||
8876 | continue; | ||||
8877 | |||||
8878 | if (DiagnoseUninitializedReference(S, FI->getLocation(), FI->getType())) { | ||||
8879 | S.Diag(Loc, diag::note_value_initialization_here) << RD; | ||||
8880 | return true; | ||||
8881 | } | ||||
8882 | } | ||||
8883 | |||||
8884 | for (const auto &BI : RD->bases()) { | ||||
8885 | if (DiagnoseUninitializedReference(S, BI.getBeginLoc(), BI.getType())) { | ||||
8886 | S.Diag(Loc, diag::note_value_initialization_here) << RD; | ||||
8887 | return true; | ||||
8888 | } | ||||
8889 | } | ||||
8890 | |||||
8891 | return false; | ||||
8892 | } | ||||
8893 | |||||
8894 | |||||
8895 | //===----------------------------------------------------------------------===// | ||||
8896 | // Diagnose initialization failures | ||||
8897 | //===----------------------------------------------------------------------===// | ||||
8898 | |||||
8899 | /// Emit notes associated with an initialization that failed due to a | ||||
8900 | /// "simple" conversion failure. | ||||
8901 | static void emitBadConversionNotes(Sema &S, const InitializedEntity &entity, | ||||
8902 | Expr *op) { | ||||
8903 | QualType destType = entity.getType(); | ||||
8904 | if (destType.getNonReferenceType()->isObjCObjectPointerType() && | ||||
8905 | op->getType()->isObjCObjectPointerType()) { | ||||
8906 | |||||
8907 | // Emit a possible note about the conversion failing because the | ||||
8908 | // operand is a message send with a related result type. | ||||
8909 | S.EmitRelatedResultTypeNote(op); | ||||
8910 | |||||
8911 | // Emit a possible note about a return failing because we're | ||||
8912 | // expecting a related result type. | ||||
8913 | if (entity.getKind() == InitializedEntity::EK_Result) | ||||
8914 | S.EmitRelatedResultTypeNoteForReturn(destType); | ||||
8915 | } | ||||
8916 | QualType fromType = op->getType(); | ||||
8917 | auto *fromDecl = fromType.getTypePtr()->getPointeeCXXRecordDecl(); | ||||
8918 | auto *destDecl = destType.getTypePtr()->getPointeeCXXRecordDecl(); | ||||
8919 | if (fromDecl && destDecl && fromDecl->getDeclKind() == Decl::CXXRecord && | ||||
8920 | destDecl->getDeclKind() == Decl::CXXRecord && | ||||
8921 | !fromDecl->isInvalidDecl() && !destDecl->isInvalidDecl() && | ||||
8922 | !fromDecl->hasDefinition()) | ||||
8923 | S.Diag(fromDecl->getLocation(), diag::note_forward_class_conversion) | ||||
8924 | << S.getASTContext().getTagDeclType(fromDecl) | ||||
8925 | << S.getASTContext().getTagDeclType(destDecl); | ||||
8926 | } | ||||
8927 | |||||
8928 | static void diagnoseListInit(Sema &S, const InitializedEntity &Entity, | ||||
8929 | InitListExpr *InitList) { | ||||
8930 | QualType DestType = Entity.getType(); | ||||
8931 | |||||
8932 | QualType E; | ||||
8933 | if (S.getLangOpts().CPlusPlus11 && S.isStdInitializerList(DestType, &E)) { | ||||
8934 | QualType ArrayType = S.Context.getConstantArrayType( | ||||
8935 | E.withConst(), | ||||
8936 | llvm::APInt(S.Context.getTypeSize(S.Context.getSizeType()), | ||||
8937 | InitList->getNumInits()), | ||||
8938 | nullptr, clang::ArrayType::Normal, 0); | ||||
8939 | InitializedEntity HiddenArray = | ||||
8940 | InitializedEntity::InitializeTemporary(ArrayType); | ||||
8941 | return diagnoseListInit(S, HiddenArray, InitList); | ||||
8942 | } | ||||
8943 | |||||
8944 | if (DestType->isReferenceType()) { | ||||
8945 | // A list-initialization failure for a reference means that we tried to | ||||
8946 | // create a temporary of the inner type (per [dcl.init.list]p3.6) and the | ||||
8947 | // inner initialization failed. | ||||
8948 | QualType T = DestType->castAs<ReferenceType>()->getPointeeType(); | ||||
8949 | diagnoseListInit(S, InitializedEntity::InitializeTemporary(T), InitList); | ||||
8950 | SourceLocation Loc = InitList->getBeginLoc(); | ||||
8951 | if (auto *D = Entity.getDecl()) | ||||
8952 | Loc = D->getLocation(); | ||||
8953 | S.Diag(Loc, diag::note_in_reference_temporary_list_initializer) << T; | ||||
8954 | return; | ||||
8955 | } | ||||
8956 | |||||
8957 | InitListChecker DiagnoseInitList(S, Entity, InitList, DestType, | ||||
8958 | /*VerifyOnly=*/false, | ||||
8959 | /*TreatUnavailableAsInvalid=*/false); | ||||
8960 | assert(DiagnoseInitList.HadError() &&(static_cast <bool> (DiagnoseInitList.HadError() && "Inconsistent init list check result.") ? void (0) : __assert_fail ("DiagnoseInitList.HadError() && \"Inconsistent init list check result.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8961, __extension__ __PRETTY_FUNCTION__)) | ||||
8961 | "Inconsistent init list check result.")(static_cast <bool> (DiagnoseInitList.HadError() && "Inconsistent init list check result.") ? void (0) : __assert_fail ("DiagnoseInitList.HadError() && \"Inconsistent init list check result.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8961, __extension__ __PRETTY_FUNCTION__)); | ||||
8962 | } | ||||
8963 | |||||
8964 | bool InitializationSequence::Diagnose(Sema &S, | ||||
8965 | const InitializedEntity &Entity, | ||||
8966 | const InitializationKind &Kind, | ||||
8967 | ArrayRef<Expr *> Args) { | ||||
8968 | if (!Failed()) | ||||
8969 | return false; | ||||
8970 | |||||
8971 | // When we want to diagnose only one element of a braced-init-list, | ||||
8972 | // we need to factor it out. | ||||
8973 | Expr *OnlyArg; | ||||
8974 | if (Args.size() == 1) { | ||||
8975 | auto *List = dyn_cast<InitListExpr>(Args[0]); | ||||
8976 | if (List && List->getNumInits() == 1) | ||||
8977 | OnlyArg = List->getInit(0); | ||||
8978 | else | ||||
8979 | OnlyArg = Args[0]; | ||||
8980 | } | ||||
8981 | else | ||||
8982 | OnlyArg = nullptr; | ||||
8983 | |||||
8984 | QualType DestType = Entity.getType(); | ||||
8985 | switch (Failure) { | ||||
8986 | case FK_TooManyInitsForReference: | ||||
8987 | // FIXME: Customize for the initialized entity? | ||||
8988 | if (Args.empty()) { | ||||
8989 | // Dig out the reference subobject which is uninitialized and diagnose it. | ||||
8990 | // If this is value-initialization, this could be nested some way within | ||||
8991 | // the target type. | ||||
8992 | assert(Kind.getKind() == InitializationKind::IK_Value ||(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Value || DestType->isReferenceType()) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Value || DestType->isReferenceType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8993, __extension__ __PRETTY_FUNCTION__)) | ||||
8993 | DestType->isReferenceType())(static_cast <bool> (Kind.getKind() == InitializationKind ::IK_Value || DestType->isReferenceType()) ? void (0) : __assert_fail ("Kind.getKind() == InitializationKind::IK_Value || DestType->isReferenceType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8993, __extension__ __PRETTY_FUNCTION__)); | ||||
8994 | bool Diagnosed = | ||||
8995 | DiagnoseUninitializedReference(S, Kind.getLocation(), DestType); | ||||
8996 | assert(Diagnosed && "couldn't find uninitialized reference to diagnose")(static_cast <bool> (Diagnosed && "couldn't find uninitialized reference to diagnose" ) ? void (0) : __assert_fail ("Diagnosed && \"couldn't find uninitialized reference to diagnose\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 8996, __extension__ __PRETTY_FUNCTION__)); | ||||
8997 | (void)Diagnosed; | ||||
8998 | } else // FIXME: diagnostic below could be better! | ||||
8999 | S.Diag(Kind.getLocation(), diag::err_reference_has_multiple_inits) | ||||
9000 | << SourceRange(Args.front()->getBeginLoc(), Args.back()->getEndLoc()); | ||||
9001 | break; | ||||
9002 | case FK_ParenthesizedListInitForReference: | ||||
9003 | S.Diag(Kind.getLocation(), diag::err_list_init_in_parens) | ||||
9004 | << 1 << Entity.getType() << Args[0]->getSourceRange(); | ||||
9005 | break; | ||||
9006 | |||||
9007 | case FK_ArrayNeedsInitList: | ||||
9008 | S.Diag(Kind.getLocation(), diag::err_array_init_not_init_list) << 0; | ||||
9009 | break; | ||||
9010 | case FK_ArrayNeedsInitListOrStringLiteral: | ||||
9011 | S.Diag(Kind.getLocation(), diag::err_array_init_not_init_list) << 1; | ||||
9012 | break; | ||||
9013 | case FK_ArrayNeedsInitListOrWideStringLiteral: | ||||
9014 | S.Diag(Kind.getLocation(), diag::err_array_init_not_init_list) << 2; | ||||
9015 | break; | ||||
9016 | case FK_NarrowStringIntoWideCharArray: | ||||
9017 | S.Diag(Kind.getLocation(), diag::err_array_init_narrow_string_into_wchar); | ||||
9018 | break; | ||||
9019 | case FK_WideStringIntoCharArray: | ||||
9020 | S.Diag(Kind.getLocation(), diag::err_array_init_wide_string_into_char); | ||||
9021 | break; | ||||
9022 | case FK_IncompatWideStringIntoWideChar: | ||||
9023 | S.Diag(Kind.getLocation(), | ||||
9024 | diag::err_array_init_incompat_wide_string_into_wchar); | ||||
9025 | break; | ||||
9026 | case FK_PlainStringIntoUTF8Char: | ||||
9027 | S.Diag(Kind.getLocation(), | ||||
9028 | diag::err_array_init_plain_string_into_char8_t); | ||||
9029 | S.Diag(Args.front()->getBeginLoc(), | ||||
9030 | diag::note_array_init_plain_string_into_char8_t) | ||||
9031 | << FixItHint::CreateInsertion(Args.front()->getBeginLoc(), "u8"); | ||||
9032 | break; | ||||
9033 | case FK_UTF8StringIntoPlainChar: | ||||
9034 | S.Diag(Kind.getLocation(), | ||||
9035 | diag::err_array_init_utf8_string_into_char) | ||||
9036 | << S.getLangOpts().CPlusPlus20; | ||||
9037 | break; | ||||
9038 | case FK_ArrayTypeMismatch: | ||||
9039 | case FK_NonConstantArrayInit: | ||||
9040 | S.Diag(Kind.getLocation(), | ||||
9041 | (Failure == FK_ArrayTypeMismatch | ||||
9042 | ? diag::err_array_init_different_type | ||||
9043 | : diag::err_array_init_non_constant_array)) | ||||
9044 | << DestType.getNonReferenceType() | ||||
9045 | << OnlyArg->getType() | ||||
9046 | << Args[0]->getSourceRange(); | ||||
9047 | break; | ||||
9048 | |||||
9049 | case FK_VariableLengthArrayHasInitializer: | ||||
9050 | S.Diag(Kind.getLocation(), diag::err_variable_object_no_init) | ||||
9051 | << Args[0]->getSourceRange(); | ||||
9052 | break; | ||||
9053 | |||||
9054 | case FK_AddressOfOverloadFailed: { | ||||
9055 | DeclAccessPair Found; | ||||
9056 | S.ResolveAddressOfOverloadedFunction(OnlyArg, | ||||
9057 | DestType.getNonReferenceType(), | ||||
9058 | true, | ||||
9059 | Found); | ||||
9060 | break; | ||||
9061 | } | ||||
9062 | |||||
9063 | case FK_AddressOfUnaddressableFunction: { | ||||
9064 | auto *FD = cast<FunctionDecl>(cast<DeclRefExpr>(OnlyArg)->getDecl()); | ||||
9065 | S.checkAddressOfFunctionIsAvailable(FD, /*Complain=*/true, | ||||
9066 | OnlyArg->getBeginLoc()); | ||||
9067 | break; | ||||
9068 | } | ||||
9069 | |||||
9070 | case FK_ReferenceInitOverloadFailed: | ||||
9071 | case FK_UserConversionOverloadFailed: | ||||
9072 | switch (FailedOverloadResult) { | ||||
9073 | case OR_Ambiguous: | ||||
9074 | |||||
9075 | FailedCandidateSet.NoteCandidates( | ||||
9076 | PartialDiagnosticAt( | ||||
9077 | Kind.getLocation(), | ||||
9078 | Failure == FK_UserConversionOverloadFailed | ||||
9079 | ? (S.PDiag(diag::err_typecheck_ambiguous_condition) | ||||
9080 | << OnlyArg->getType() << DestType | ||||
9081 | << Args[0]->getSourceRange()) | ||||
9082 | : (S.PDiag(diag::err_ref_init_ambiguous) | ||||
9083 | << DestType << OnlyArg->getType() | ||||
9084 | << Args[0]->getSourceRange())), | ||||
9085 | S, OCD_AmbiguousCandidates, Args); | ||||
9086 | break; | ||||
9087 | |||||
9088 | case OR_No_Viable_Function: { | ||||
9089 | auto Cands = FailedCandidateSet.CompleteCandidates(S, OCD_AllCandidates, Args); | ||||
9090 | if (!S.RequireCompleteType(Kind.getLocation(), | ||||
9091 | DestType.getNonReferenceType(), | ||||
9092 | diag::err_typecheck_nonviable_condition_incomplete, | ||||
9093 | OnlyArg->getType(), Args[0]->getSourceRange())) | ||||
9094 | S.Diag(Kind.getLocation(), diag::err_typecheck_nonviable_condition) | ||||
9095 | << (Entity.getKind() == InitializedEntity::EK_Result) | ||||
9096 | << OnlyArg->getType() << Args[0]->getSourceRange() | ||||
9097 | << DestType.getNonReferenceType(); | ||||
9098 | |||||
9099 | FailedCandidateSet.NoteCandidates(S, Args, Cands); | ||||
9100 | break; | ||||
9101 | } | ||||
9102 | case OR_Deleted: { | ||||
9103 | S.Diag(Kind.getLocation(), diag::err_typecheck_deleted_function) | ||||
9104 | << OnlyArg->getType() << DestType.getNonReferenceType() | ||||
9105 | << Args[0]->getSourceRange(); | ||||
9106 | OverloadCandidateSet::iterator Best; | ||||
9107 | OverloadingResult Ovl | ||||
9108 | = FailedCandidateSet.BestViableFunction(S, Kind.getLocation(), Best); | ||||
9109 | if (Ovl == OR_Deleted) { | ||||
9110 | S.NoteDeletedFunction(Best->Function); | ||||
9111 | } else { | ||||
9112 | llvm_unreachable("Inconsistent overload resolution?")::llvm::llvm_unreachable_internal("Inconsistent overload resolution?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9112); | ||||
9113 | } | ||||
9114 | break; | ||||
9115 | } | ||||
9116 | |||||
9117 | case OR_Success: | ||||
9118 | llvm_unreachable("Conversion did not fail!")::llvm::llvm_unreachable_internal("Conversion did not fail!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9118); | ||||
9119 | } | ||||
9120 | break; | ||||
9121 | |||||
9122 | case FK_NonConstLValueReferenceBindingToTemporary: | ||||
9123 | if (isa<InitListExpr>(Args[0])) { | ||||
9124 | S.Diag(Kind.getLocation(), | ||||
9125 | diag::err_lvalue_reference_bind_to_initlist) | ||||
9126 | << DestType.getNonReferenceType().isVolatileQualified() | ||||
9127 | << DestType.getNonReferenceType() | ||||
9128 | << Args[0]->getSourceRange(); | ||||
9129 | break; | ||||
9130 | } | ||||
9131 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
9132 | |||||
9133 | case FK_NonConstLValueReferenceBindingToUnrelated: | ||||
9134 | S.Diag(Kind.getLocation(), | ||||
9135 | Failure == FK_NonConstLValueReferenceBindingToTemporary | ||||
9136 | ? diag::err_lvalue_reference_bind_to_temporary | ||||
9137 | : diag::err_lvalue_reference_bind_to_unrelated) | ||||
9138 | << DestType.getNonReferenceType().isVolatileQualified() | ||||
9139 | << DestType.getNonReferenceType() | ||||
9140 | << OnlyArg->getType() | ||||
9141 | << Args[0]->getSourceRange(); | ||||
9142 | break; | ||||
9143 | |||||
9144 | case FK_NonConstLValueReferenceBindingToBitfield: { | ||||
9145 | // We don't necessarily have an unambiguous source bit-field. | ||||
9146 | FieldDecl *BitField = Args[0]->getSourceBitField(); | ||||
9147 | S.Diag(Kind.getLocation(), diag::err_reference_bind_to_bitfield) | ||||
9148 | << DestType.isVolatileQualified() | ||||
9149 | << (BitField ? BitField->getDeclName() : DeclarationName()) | ||||
9150 | << (BitField != nullptr) | ||||
9151 | << Args[0]->getSourceRange(); | ||||
9152 | if (BitField) | ||||
9153 | S.Diag(BitField->getLocation(), diag::note_bitfield_decl); | ||||
9154 | break; | ||||
9155 | } | ||||
9156 | |||||
9157 | case FK_NonConstLValueReferenceBindingToVectorElement: | ||||
9158 | S.Diag(Kind.getLocation(), diag::err_reference_bind_to_vector_element) | ||||
9159 | << DestType.isVolatileQualified() | ||||
9160 | << Args[0]->getSourceRange(); | ||||
9161 | break; | ||||
9162 | |||||
9163 | case FK_NonConstLValueReferenceBindingToMatrixElement: | ||||
9164 | S.Diag(Kind.getLocation(), diag::err_reference_bind_to_matrix_element) | ||||
9165 | << DestType.isVolatileQualified() << Args[0]->getSourceRange(); | ||||
9166 | break; | ||||
9167 | |||||
9168 | case FK_RValueReferenceBindingToLValue: | ||||
9169 | S.Diag(Kind.getLocation(), diag::err_lvalue_to_rvalue_ref) | ||||
9170 | << DestType.getNonReferenceType() << OnlyArg->getType() | ||||
9171 | << Args[0]->getSourceRange(); | ||||
9172 | break; | ||||
9173 | |||||
9174 | case FK_ReferenceAddrspaceMismatchTemporary: | ||||
9175 | S.Diag(Kind.getLocation(), diag::err_reference_bind_temporary_addrspace) | ||||
9176 | << DestType << Args[0]->getSourceRange(); | ||||
9177 | break; | ||||
9178 | |||||
9179 | case FK_ReferenceInitDropsQualifiers: { | ||||
9180 | QualType SourceType = OnlyArg->getType(); | ||||
9181 | QualType NonRefType = DestType.getNonReferenceType(); | ||||
9182 | Qualifiers DroppedQualifiers = | ||||
9183 | SourceType.getQualifiers() - NonRefType.getQualifiers(); | ||||
9184 | |||||
9185 | if (!NonRefType.getQualifiers().isAddressSpaceSupersetOf( | ||||
9186 | SourceType.getQualifiers())) | ||||
9187 | S.Diag(Kind.getLocation(), diag::err_reference_bind_drops_quals) | ||||
9188 | << NonRefType << SourceType << 1 /*addr space*/ | ||||
9189 | << Args[0]->getSourceRange(); | ||||
9190 | else if (DroppedQualifiers.hasQualifiers()) | ||||
9191 | S.Diag(Kind.getLocation(), diag::err_reference_bind_drops_quals) | ||||
9192 | << NonRefType << SourceType << 0 /*cv quals*/ | ||||
9193 | << Qualifiers::fromCVRMask(DroppedQualifiers.getCVRQualifiers()) | ||||
9194 | << DroppedQualifiers.getCVRQualifiers() << Args[0]->getSourceRange(); | ||||
9195 | else | ||||
9196 | // FIXME: Consider decomposing the type and explaining which qualifiers | ||||
9197 | // were dropped where, or on which level a 'const' is missing, etc. | ||||
9198 | S.Diag(Kind.getLocation(), diag::err_reference_bind_drops_quals) | ||||
9199 | << NonRefType << SourceType << 2 /*incompatible quals*/ | ||||
9200 | << Args[0]->getSourceRange(); | ||||
9201 | break; | ||||
9202 | } | ||||
9203 | |||||
9204 | case FK_ReferenceInitFailed: | ||||
9205 | S.Diag(Kind.getLocation(), diag::err_reference_bind_failed) | ||||
9206 | << DestType.getNonReferenceType() | ||||
9207 | << DestType.getNonReferenceType()->isIncompleteType() | ||||
9208 | << OnlyArg->isLValue() | ||||
9209 | << OnlyArg->getType() | ||||
9210 | << Args[0]->getSourceRange(); | ||||
9211 | emitBadConversionNotes(S, Entity, Args[0]); | ||||
9212 | break; | ||||
9213 | |||||
9214 | case FK_ConversionFailed: { | ||||
9215 | QualType FromType = OnlyArg->getType(); | ||||
9216 | PartialDiagnostic PDiag = S.PDiag(diag::err_init_conversion_failed) | ||||
9217 | << (int)Entity.getKind() | ||||
9218 | << DestType | ||||
9219 | << OnlyArg->isLValue() | ||||
9220 | << FromType | ||||
9221 | << Args[0]->getSourceRange(); | ||||
9222 | S.HandleFunctionTypeMismatch(PDiag, FromType, DestType); | ||||
9223 | S.Diag(Kind.getLocation(), PDiag); | ||||
9224 | emitBadConversionNotes(S, Entity, Args[0]); | ||||
9225 | break; | ||||
9226 | } | ||||
9227 | |||||
9228 | case FK_ConversionFromPropertyFailed: | ||||
9229 | // No-op. This error has already been reported. | ||||
9230 | break; | ||||
9231 | |||||
9232 | case FK_TooManyInitsForScalar: { | ||||
9233 | SourceRange R; | ||||
9234 | |||||
9235 | auto *InitList = dyn_cast<InitListExpr>(Args[0]); | ||||
9236 | if (InitList && InitList->getNumInits() >= 1) { | ||||
9237 | R = SourceRange(InitList->getInit(0)->getEndLoc(), InitList->getEndLoc()); | ||||
9238 | } else { | ||||
9239 | assert(Args.size() > 1 && "Expected multiple initializers!")(static_cast <bool> (Args.size() > 1 && "Expected multiple initializers!" ) ? void (0) : __assert_fail ("Args.size() > 1 && \"Expected multiple initializers!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9239, __extension__ __PRETTY_FUNCTION__)); | ||||
9240 | R = SourceRange(Args.front()->getEndLoc(), Args.back()->getEndLoc()); | ||||
9241 | } | ||||
9242 | |||||
9243 | R.setBegin(S.getLocForEndOfToken(R.getBegin())); | ||||
9244 | if (Kind.isCStyleOrFunctionalCast()) | ||||
9245 | S.Diag(Kind.getLocation(), diag::err_builtin_func_cast_more_than_one_arg) | ||||
9246 | << R; | ||||
9247 | else | ||||
9248 | S.Diag(Kind.getLocation(), diag::err_excess_initializers) | ||||
9249 | << /*scalar=*/2 << R; | ||||
9250 | break; | ||||
9251 | } | ||||
9252 | |||||
9253 | case FK_ParenthesizedListInitForScalar: | ||||
9254 | S.Diag(Kind.getLocation(), diag::err_list_init_in_parens) | ||||
9255 | << 0 << Entity.getType() << Args[0]->getSourceRange(); | ||||
9256 | break; | ||||
9257 | |||||
9258 | case FK_ReferenceBindingToInitList: | ||||
9259 | S.Diag(Kind.getLocation(), diag::err_reference_bind_init_list) | ||||
9260 | << DestType.getNonReferenceType() << Args[0]->getSourceRange(); | ||||
9261 | break; | ||||
9262 | |||||
9263 | case FK_InitListBadDestinationType: | ||||
9264 | S.Diag(Kind.getLocation(), diag::err_init_list_bad_dest_type) | ||||
9265 | << (DestType->isRecordType()) << DestType << Args[0]->getSourceRange(); | ||||
9266 | break; | ||||
9267 | |||||
9268 | case FK_ListConstructorOverloadFailed: | ||||
9269 | case FK_ConstructorOverloadFailed: { | ||||
9270 | SourceRange ArgsRange; | ||||
9271 | if (Args.size()) | ||||
9272 | ArgsRange = | ||||
9273 | SourceRange(Args.front()->getBeginLoc(), Args.back()->getEndLoc()); | ||||
9274 | |||||
9275 | if (Failure == FK_ListConstructorOverloadFailed) { | ||||
9276 | assert(Args.size() == 1 &&(static_cast <bool> (Args.size() == 1 && "List construction from other than 1 argument." ) ? void (0) : __assert_fail ("Args.size() == 1 && \"List construction from other than 1 argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9277, __extension__ __PRETTY_FUNCTION__)) | ||||
9277 | "List construction from other than 1 argument.")(static_cast <bool> (Args.size() == 1 && "List construction from other than 1 argument." ) ? void (0) : __assert_fail ("Args.size() == 1 && \"List construction from other than 1 argument.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9277, __extension__ __PRETTY_FUNCTION__)); | ||||
9278 | InitListExpr *InitList = cast<InitListExpr>(Args[0]); | ||||
9279 | Args = MultiExprArg(InitList->getInits(), InitList->getNumInits()); | ||||
9280 | } | ||||
9281 | |||||
9282 | // FIXME: Using "DestType" for the entity we're printing is probably | ||||
9283 | // bad. | ||||
9284 | switch (FailedOverloadResult) { | ||||
9285 | case OR_Ambiguous: | ||||
9286 | FailedCandidateSet.NoteCandidates( | ||||
9287 | PartialDiagnosticAt(Kind.getLocation(), | ||||
9288 | S.PDiag(diag::err_ovl_ambiguous_init) | ||||
9289 | << DestType << ArgsRange), | ||||
9290 | S, OCD_AmbiguousCandidates, Args); | ||||
9291 | break; | ||||
9292 | |||||
9293 | case OR_No_Viable_Function: | ||||
9294 | if (Kind.getKind() == InitializationKind::IK_Default && | ||||
9295 | (Entity.getKind() == InitializedEntity::EK_Base || | ||||
9296 | Entity.getKind() == InitializedEntity::EK_Member) && | ||||
9297 | isa<CXXConstructorDecl>(S.CurContext)) { | ||||
9298 | // This is implicit default initialization of a member or | ||||
9299 | // base within a constructor. If no viable function was | ||||
9300 | // found, notify the user that they need to explicitly | ||||
9301 | // initialize this base/member. | ||||
9302 | CXXConstructorDecl *Constructor | ||||
9303 | = cast<CXXConstructorDecl>(S.CurContext); | ||||
9304 | const CXXRecordDecl *InheritedFrom = nullptr; | ||||
9305 | if (auto Inherited = Constructor->getInheritedConstructor()) | ||||
9306 | InheritedFrom = Inherited.getShadowDecl()->getNominatedBaseClass(); | ||||
9307 | if (Entity.getKind() == InitializedEntity::EK_Base) { | ||||
9308 | S.Diag(Kind.getLocation(), diag::err_missing_default_ctor) | ||||
9309 | << (InheritedFrom ? 2 : Constructor->isImplicit() ? 1 : 0) | ||||
9310 | << S.Context.getTypeDeclType(Constructor->getParent()) | ||||
9311 | << /*base=*/0 | ||||
9312 | << Entity.getType() | ||||
9313 | << InheritedFrom; | ||||
9314 | |||||
9315 | RecordDecl *BaseDecl | ||||
9316 | = Entity.getBaseSpecifier()->getType()->castAs<RecordType>() | ||||
9317 | ->getDecl(); | ||||
9318 | S.Diag(BaseDecl->getLocation(), diag::note_previous_decl) | ||||
9319 | << S.Context.getTagDeclType(BaseDecl); | ||||
9320 | } else { | ||||
9321 | S.Diag(Kind.getLocation(), diag::err_missing_default_ctor) | ||||
9322 | << (InheritedFrom ? 2 : Constructor->isImplicit() ? 1 : 0) | ||||
9323 | << S.Context.getTypeDeclType(Constructor->getParent()) | ||||
9324 | << /*member=*/1 | ||||
9325 | << Entity.getName() | ||||
9326 | << InheritedFrom; | ||||
9327 | S.Diag(Entity.getDecl()->getLocation(), | ||||
9328 | diag::note_member_declared_at); | ||||
9329 | |||||
9330 | if (const RecordType *Record | ||||
9331 | = Entity.getType()->getAs<RecordType>()) | ||||
9332 | S.Diag(Record->getDecl()->getLocation(), | ||||
9333 | diag::note_previous_decl) | ||||
9334 | << S.Context.getTagDeclType(Record->getDecl()); | ||||
9335 | } | ||||
9336 | break; | ||||
9337 | } | ||||
9338 | |||||
9339 | FailedCandidateSet.NoteCandidates( | ||||
9340 | PartialDiagnosticAt( | ||||
9341 | Kind.getLocation(), | ||||
9342 | S.PDiag(diag::err_ovl_no_viable_function_in_init) | ||||
9343 | << DestType << ArgsRange), | ||||
9344 | S, OCD_AllCandidates, Args); | ||||
9345 | break; | ||||
9346 | |||||
9347 | case OR_Deleted: { | ||||
9348 | OverloadCandidateSet::iterator Best; | ||||
9349 | OverloadingResult Ovl | ||||
9350 | = FailedCandidateSet.BestViableFunction(S, Kind.getLocation(), Best); | ||||
9351 | if (Ovl != OR_Deleted) { | ||||
9352 | S.Diag(Kind.getLocation(), diag::err_ovl_deleted_init) | ||||
9353 | << DestType << ArgsRange; | ||||
9354 | llvm_unreachable("Inconsistent overload resolution?")::llvm::llvm_unreachable_internal("Inconsistent overload resolution?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9354); | ||||
9355 | break; | ||||
9356 | } | ||||
9357 | |||||
9358 | // If this is a defaulted or implicitly-declared function, then | ||||
9359 | // it was implicitly deleted. Make it clear that the deletion was | ||||
9360 | // implicit. | ||||
9361 | if (S.isImplicitlyDeleted(Best->Function)) | ||||
9362 | S.Diag(Kind.getLocation(), diag::err_ovl_deleted_special_init) | ||||
9363 | << S.getSpecialMember(cast<CXXMethodDecl>(Best->Function)) | ||||
9364 | << DestType << ArgsRange; | ||||
9365 | else | ||||
9366 | S.Diag(Kind.getLocation(), diag::err_ovl_deleted_init) | ||||
9367 | << DestType << ArgsRange; | ||||
9368 | |||||
9369 | S.NoteDeletedFunction(Best->Function); | ||||
9370 | break; | ||||
9371 | } | ||||
9372 | |||||
9373 | case OR_Success: | ||||
9374 | llvm_unreachable("Conversion did not fail!")::llvm::llvm_unreachable_internal("Conversion did not fail!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9374); | ||||
9375 | } | ||||
9376 | } | ||||
9377 | break; | ||||
9378 | |||||
9379 | case FK_DefaultInitOfConst: | ||||
9380 | if (Entity.getKind() == InitializedEntity::EK_Member && | ||||
9381 | isa<CXXConstructorDecl>(S.CurContext)) { | ||||
9382 | // This is implicit default-initialization of a const member in | ||||
9383 | // a constructor. Complain that it needs to be explicitly | ||||
9384 | // initialized. | ||||
9385 | CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(S.CurContext); | ||||
9386 | S.Diag(Kind.getLocation(), diag::err_uninitialized_member_in_ctor) | ||||
9387 | << (Constructor->getInheritedConstructor() ? 2 : | ||||
9388 | Constructor->isImplicit() ? 1 : 0) | ||||
9389 | << S.Context.getTypeDeclType(Constructor->getParent()) | ||||
9390 | << /*const=*/1 | ||||
9391 | << Entity.getName(); | ||||
9392 | S.Diag(Entity.getDecl()->getLocation(), diag::note_previous_decl) | ||||
9393 | << Entity.getName(); | ||||
9394 | } else { | ||||
9395 | S.Diag(Kind.getLocation(), diag::err_default_init_const) | ||||
9396 | << DestType << (bool)DestType->getAs<RecordType>(); | ||||
9397 | } | ||||
9398 | break; | ||||
9399 | |||||
9400 | case FK_Incomplete: | ||||
9401 | S.RequireCompleteType(Kind.getLocation(), FailedIncompleteType, | ||||
9402 | diag::err_init_incomplete_type); | ||||
9403 | break; | ||||
9404 | |||||
9405 | case FK_ListInitializationFailed: { | ||||
9406 | // Run the init list checker again to emit diagnostics. | ||||
9407 | InitListExpr *InitList = cast<InitListExpr>(Args[0]); | ||||
9408 | diagnoseListInit(S, Entity, InitList); | ||||
9409 | break; | ||||
9410 | } | ||||
9411 | |||||
9412 | case FK_PlaceholderType: { | ||||
9413 | // FIXME: Already diagnosed! | ||||
9414 | break; | ||||
9415 | } | ||||
9416 | |||||
9417 | case FK_ExplicitConstructor: { | ||||
9418 | S.Diag(Kind.getLocation(), diag::err_selected_explicit_constructor) | ||||
9419 | << Args[0]->getSourceRange(); | ||||
9420 | OverloadCandidateSet::iterator Best; | ||||
9421 | OverloadingResult Ovl | ||||
9422 | = FailedCandidateSet.BestViableFunction(S, Kind.getLocation(), Best); | ||||
9423 | (void)Ovl; | ||||
9424 | assert(Ovl == OR_Success && "Inconsistent overload resolution")(static_cast <bool> (Ovl == OR_Success && "Inconsistent overload resolution" ) ? void (0) : __assert_fail ("Ovl == OR_Success && \"Inconsistent overload resolution\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9424, __extension__ __PRETTY_FUNCTION__)); | ||||
9425 | CXXConstructorDecl *CtorDecl = cast<CXXConstructorDecl>(Best->Function); | ||||
9426 | S.Diag(CtorDecl->getLocation(), | ||||
9427 | diag::note_explicit_ctor_deduction_guide_here) << false; | ||||
9428 | break; | ||||
9429 | } | ||||
9430 | } | ||||
9431 | |||||
9432 | PrintInitLocationNote(S, Entity); | ||||
9433 | return true; | ||||
9434 | } | ||||
9435 | |||||
9436 | void InitializationSequence::dump(raw_ostream &OS) const { | ||||
9437 | switch (SequenceKind) { | ||||
9438 | case FailedSequence: { | ||||
9439 | OS << "Failed sequence: "; | ||||
9440 | switch (Failure) { | ||||
9441 | case FK_TooManyInitsForReference: | ||||
9442 | OS << "too many initializers for reference"; | ||||
9443 | break; | ||||
9444 | |||||
9445 | case FK_ParenthesizedListInitForReference: | ||||
9446 | OS << "parenthesized list init for reference"; | ||||
9447 | break; | ||||
9448 | |||||
9449 | case FK_ArrayNeedsInitList: | ||||
9450 | OS << "array requires initializer list"; | ||||
9451 | break; | ||||
9452 | |||||
9453 | case FK_AddressOfUnaddressableFunction: | ||||
9454 | OS << "address of unaddressable function was taken"; | ||||
9455 | break; | ||||
9456 | |||||
9457 | case FK_ArrayNeedsInitListOrStringLiteral: | ||||
9458 | OS << "array requires initializer list or string literal"; | ||||
9459 | break; | ||||
9460 | |||||
9461 | case FK_ArrayNeedsInitListOrWideStringLiteral: | ||||
9462 | OS << "array requires initializer list or wide string literal"; | ||||
9463 | break; | ||||
9464 | |||||
9465 | case FK_NarrowStringIntoWideCharArray: | ||||
9466 | OS << "narrow string into wide char array"; | ||||
9467 | break; | ||||
9468 | |||||
9469 | case FK_WideStringIntoCharArray: | ||||
9470 | OS << "wide string into char array"; | ||||
9471 | break; | ||||
9472 | |||||
9473 | case FK_IncompatWideStringIntoWideChar: | ||||
9474 | OS << "incompatible wide string into wide char array"; | ||||
9475 | break; | ||||
9476 | |||||
9477 | case FK_PlainStringIntoUTF8Char: | ||||
9478 | OS << "plain string literal into char8_t array"; | ||||
9479 | break; | ||||
9480 | |||||
9481 | case FK_UTF8StringIntoPlainChar: | ||||
9482 | OS << "u8 string literal into char array"; | ||||
9483 | break; | ||||
9484 | |||||
9485 | case FK_ArrayTypeMismatch: | ||||
9486 | OS << "array type mismatch"; | ||||
9487 | break; | ||||
9488 | |||||
9489 | case FK_NonConstantArrayInit: | ||||
9490 | OS << "non-constant array initializer"; | ||||
9491 | break; | ||||
9492 | |||||
9493 | case FK_AddressOfOverloadFailed: | ||||
9494 | OS << "address of overloaded function failed"; | ||||
9495 | break; | ||||
9496 | |||||
9497 | case FK_ReferenceInitOverloadFailed: | ||||
9498 | OS << "overload resolution for reference initialization failed"; | ||||
9499 | break; | ||||
9500 | |||||
9501 | case FK_NonConstLValueReferenceBindingToTemporary: | ||||
9502 | OS << "non-const lvalue reference bound to temporary"; | ||||
9503 | break; | ||||
9504 | |||||
9505 | case FK_NonConstLValueReferenceBindingToBitfield: | ||||
9506 | OS << "non-const lvalue reference bound to bit-field"; | ||||
9507 | break; | ||||
9508 | |||||
9509 | case FK_NonConstLValueReferenceBindingToVectorElement: | ||||
9510 | OS << "non-const lvalue reference bound to vector element"; | ||||
9511 | break; | ||||
9512 | |||||
9513 | case FK_NonConstLValueReferenceBindingToMatrixElement: | ||||
9514 | OS << "non-const lvalue reference bound to matrix element"; | ||||
9515 | break; | ||||
9516 | |||||
9517 | case FK_NonConstLValueReferenceBindingToUnrelated: | ||||
9518 | OS << "non-const lvalue reference bound to unrelated type"; | ||||
9519 | break; | ||||
9520 | |||||
9521 | case FK_RValueReferenceBindingToLValue: | ||||
9522 | OS << "rvalue reference bound to an lvalue"; | ||||
9523 | break; | ||||
9524 | |||||
9525 | case FK_ReferenceInitDropsQualifiers: | ||||
9526 | OS << "reference initialization drops qualifiers"; | ||||
9527 | break; | ||||
9528 | |||||
9529 | case FK_ReferenceAddrspaceMismatchTemporary: | ||||
9530 | OS << "reference with mismatching address space bound to temporary"; | ||||
9531 | break; | ||||
9532 | |||||
9533 | case FK_ReferenceInitFailed: | ||||
9534 | OS << "reference initialization failed"; | ||||
9535 | break; | ||||
9536 | |||||
9537 | case FK_ConversionFailed: | ||||
9538 | OS << "conversion failed"; | ||||
9539 | break; | ||||
9540 | |||||
9541 | case FK_ConversionFromPropertyFailed: | ||||
9542 | OS << "conversion from property failed"; | ||||
9543 | break; | ||||
9544 | |||||
9545 | case FK_TooManyInitsForScalar: | ||||
9546 | OS << "too many initializers for scalar"; | ||||
9547 | break; | ||||
9548 | |||||
9549 | case FK_ParenthesizedListInitForScalar: | ||||
9550 | OS << "parenthesized list init for reference"; | ||||
9551 | break; | ||||
9552 | |||||
9553 | case FK_ReferenceBindingToInitList: | ||||
9554 | OS << "referencing binding to initializer list"; | ||||
9555 | break; | ||||
9556 | |||||
9557 | case FK_InitListBadDestinationType: | ||||
9558 | OS << "initializer list for non-aggregate, non-scalar type"; | ||||
9559 | break; | ||||
9560 | |||||
9561 | case FK_UserConversionOverloadFailed: | ||||
9562 | OS << "overloading failed for user-defined conversion"; | ||||
9563 | break; | ||||
9564 | |||||
9565 | case FK_ConstructorOverloadFailed: | ||||
9566 | OS << "constructor overloading failed"; | ||||
9567 | break; | ||||
9568 | |||||
9569 | case FK_DefaultInitOfConst: | ||||
9570 | OS << "default initialization of a const variable"; | ||||
9571 | break; | ||||
9572 | |||||
9573 | case FK_Incomplete: | ||||
9574 | OS << "initialization of incomplete type"; | ||||
9575 | break; | ||||
9576 | |||||
9577 | case FK_ListInitializationFailed: | ||||
9578 | OS << "list initialization checker failure"; | ||||
9579 | break; | ||||
9580 | |||||
9581 | case FK_VariableLengthArrayHasInitializer: | ||||
9582 | OS << "variable length array has an initializer"; | ||||
9583 | break; | ||||
9584 | |||||
9585 | case FK_PlaceholderType: | ||||
9586 | OS << "initializer expression isn't contextually valid"; | ||||
9587 | break; | ||||
9588 | |||||
9589 | case FK_ListConstructorOverloadFailed: | ||||
9590 | OS << "list constructor overloading failed"; | ||||
9591 | break; | ||||
9592 | |||||
9593 | case FK_ExplicitConstructor: | ||||
9594 | OS << "list copy initialization chose explicit constructor"; | ||||
9595 | break; | ||||
9596 | } | ||||
9597 | OS << '\n'; | ||||
9598 | return; | ||||
9599 | } | ||||
9600 | |||||
9601 | case DependentSequence: | ||||
9602 | OS << "Dependent sequence\n"; | ||||
9603 | return; | ||||
9604 | |||||
9605 | case NormalSequence: | ||||
9606 | OS << "Normal sequence: "; | ||||
9607 | break; | ||||
9608 | } | ||||
9609 | |||||
9610 | for (step_iterator S = step_begin(), SEnd = step_end(); S != SEnd; ++S) { | ||||
9611 | if (S != step_begin()) { | ||||
9612 | OS << " -> "; | ||||
9613 | } | ||||
9614 | |||||
9615 | switch (S->Kind) { | ||||
9616 | case SK_ResolveAddressOfOverloadedFunction: | ||||
9617 | OS << "resolve address of overloaded function"; | ||||
9618 | break; | ||||
9619 | |||||
9620 | case SK_CastDerivedToBasePRValue: | ||||
9621 | OS << "derived-to-base (prvalue)"; | ||||
9622 | break; | ||||
9623 | |||||
9624 | case SK_CastDerivedToBaseXValue: | ||||
9625 | OS << "derived-to-base (xvalue)"; | ||||
9626 | break; | ||||
9627 | |||||
9628 | case SK_CastDerivedToBaseLValue: | ||||
9629 | OS << "derived-to-base (lvalue)"; | ||||
9630 | break; | ||||
9631 | |||||
9632 | case SK_BindReference: | ||||
9633 | OS << "bind reference to lvalue"; | ||||
9634 | break; | ||||
9635 | |||||
9636 | case SK_BindReferenceToTemporary: | ||||
9637 | OS << "bind reference to a temporary"; | ||||
9638 | break; | ||||
9639 | |||||
9640 | case SK_FinalCopy: | ||||
9641 | OS << "final copy in class direct-initialization"; | ||||
9642 | break; | ||||
9643 | |||||
9644 | case SK_ExtraneousCopyToTemporary: | ||||
9645 | OS << "extraneous C++03 copy to temporary"; | ||||
9646 | break; | ||||
9647 | |||||
9648 | case SK_UserConversion: | ||||
9649 | OS << "user-defined conversion via " << *S->Function.Function; | ||||
9650 | break; | ||||
9651 | |||||
9652 | case SK_QualificationConversionPRValue: | ||||
9653 | OS << "qualification conversion (prvalue)"; | ||||
9654 | break; | ||||
9655 | |||||
9656 | case SK_QualificationConversionXValue: | ||||
9657 | OS << "qualification conversion (xvalue)"; | ||||
9658 | break; | ||||
9659 | |||||
9660 | case SK_QualificationConversionLValue: | ||||
9661 | OS << "qualification conversion (lvalue)"; | ||||
9662 | break; | ||||
9663 | |||||
9664 | case SK_FunctionReferenceConversion: | ||||
9665 | OS << "function reference conversion"; | ||||
9666 | break; | ||||
9667 | |||||
9668 | case SK_AtomicConversion: | ||||
9669 | OS << "non-atomic-to-atomic conversion"; | ||||
9670 | break; | ||||
9671 | |||||
9672 | case SK_ConversionSequence: | ||||
9673 | OS << "implicit conversion sequence ("; | ||||
9674 | S->ICS->dump(); // FIXME: use OS | ||||
9675 | OS << ")"; | ||||
9676 | break; | ||||
9677 | |||||
9678 | case SK_ConversionSequenceNoNarrowing: | ||||
9679 | OS << "implicit conversion sequence with narrowing prohibited ("; | ||||
9680 | S->ICS->dump(); // FIXME: use OS | ||||
9681 | OS << ")"; | ||||
9682 | break; | ||||
9683 | |||||
9684 | case SK_ListInitialization: | ||||
9685 | OS << "list aggregate initialization"; | ||||
9686 | break; | ||||
9687 | |||||
9688 | case SK_UnwrapInitList: | ||||
9689 | OS << "unwrap reference initializer list"; | ||||
9690 | break; | ||||
9691 | |||||
9692 | case SK_RewrapInitList: | ||||
9693 | OS << "rewrap reference initializer list"; | ||||
9694 | break; | ||||
9695 | |||||
9696 | case SK_ConstructorInitialization: | ||||
9697 | OS << "constructor initialization"; | ||||
9698 | break; | ||||
9699 | |||||
9700 | case SK_ConstructorInitializationFromList: | ||||
9701 | OS << "list initialization via constructor"; | ||||
9702 | break; | ||||
9703 | |||||
9704 | case SK_ZeroInitialization: | ||||
9705 | OS << "zero initialization"; | ||||
9706 | break; | ||||
9707 | |||||
9708 | case SK_CAssignment: | ||||
9709 | OS << "C assignment"; | ||||
9710 | break; | ||||
9711 | |||||
9712 | case SK_StringInit: | ||||
9713 | OS << "string initialization"; | ||||
9714 | break; | ||||
9715 | |||||
9716 | case SK_ObjCObjectConversion: | ||||
9717 | OS << "Objective-C object conversion"; | ||||
9718 | break; | ||||
9719 | |||||
9720 | case SK_ArrayLoopIndex: | ||||
9721 | OS << "indexing for array initialization loop"; | ||||
9722 | break; | ||||
9723 | |||||
9724 | case SK_ArrayLoopInit: | ||||
9725 | OS << "array initialization loop"; | ||||
9726 | break; | ||||
9727 | |||||
9728 | case SK_ArrayInit: | ||||
9729 | OS << "array initialization"; | ||||
9730 | break; | ||||
9731 | |||||
9732 | case SK_GNUArrayInit: | ||||
9733 | OS << "array initialization (GNU extension)"; | ||||
9734 | break; | ||||
9735 | |||||
9736 | case SK_ParenthesizedArrayInit: | ||||
9737 | OS << "parenthesized array initialization"; | ||||
9738 | break; | ||||
9739 | |||||
9740 | case SK_PassByIndirectCopyRestore: | ||||
9741 | OS << "pass by indirect copy and restore"; | ||||
9742 | break; | ||||
9743 | |||||
9744 | case SK_PassByIndirectRestore: | ||||
9745 | OS << "pass by indirect restore"; | ||||
9746 | break; | ||||
9747 | |||||
9748 | case SK_ProduceObjCObject: | ||||
9749 | OS << "Objective-C object retension"; | ||||
9750 | break; | ||||
9751 | |||||
9752 | case SK_StdInitializerList: | ||||
9753 | OS << "std::initializer_list from initializer list"; | ||||
9754 | break; | ||||
9755 | |||||
9756 | case SK_StdInitializerListConstructorCall: | ||||
9757 | OS << "list initialization from std::initializer_list"; | ||||
9758 | break; | ||||
9759 | |||||
9760 | case SK_OCLSamplerInit: | ||||
9761 | OS << "OpenCL sampler_t from integer constant"; | ||||
9762 | break; | ||||
9763 | |||||
9764 | case SK_OCLZeroOpaqueType: | ||||
9765 | OS << "OpenCL opaque type from zero"; | ||||
9766 | break; | ||||
9767 | } | ||||
9768 | |||||
9769 | OS << " [" << S->Type.getAsString() << ']'; | ||||
9770 | } | ||||
9771 | |||||
9772 | OS << '\n'; | ||||
9773 | } | ||||
9774 | |||||
9775 | void InitializationSequence::dump() const { | ||||
9776 | dump(llvm::errs()); | ||||
9777 | } | ||||
9778 | |||||
9779 | static bool NarrowingErrs(const LangOptions &L) { | ||||
9780 | return L.CPlusPlus11 && | ||||
9781 | (!L.MicrosoftExt || L.isCompatibleWithMSVC(LangOptions::MSVC2015)); | ||||
9782 | } | ||||
9783 | |||||
9784 | static void DiagnoseNarrowingInInitList(Sema &S, | ||||
9785 | const ImplicitConversionSequence &ICS, | ||||
9786 | QualType PreNarrowingType, | ||||
9787 | QualType EntityType, | ||||
9788 | const Expr *PostInit) { | ||||
9789 | const StandardConversionSequence *SCS = nullptr; | ||||
9790 | switch (ICS.getKind()) { | ||||
9791 | case ImplicitConversionSequence::StandardConversion: | ||||
9792 | SCS = &ICS.Standard; | ||||
9793 | break; | ||||
9794 | case ImplicitConversionSequence::UserDefinedConversion: | ||||
9795 | SCS = &ICS.UserDefined.After; | ||||
9796 | break; | ||||
9797 | case ImplicitConversionSequence::AmbiguousConversion: | ||||
9798 | case ImplicitConversionSequence::EllipsisConversion: | ||||
9799 | case ImplicitConversionSequence::BadConversion: | ||||
9800 | return; | ||||
9801 | } | ||||
9802 | |||||
9803 | // C++11 [dcl.init.list]p7: Check whether this is a narrowing conversion. | ||||
9804 | APValue ConstantValue; | ||||
9805 | QualType ConstantType; | ||||
9806 | switch (SCS->getNarrowingKind(S.Context, PostInit, ConstantValue, | ||||
9807 | ConstantType)) { | ||||
9808 | case NK_Not_Narrowing: | ||||
9809 | case NK_Dependent_Narrowing: | ||||
9810 | // No narrowing occurred. | ||||
9811 | return; | ||||
9812 | |||||
9813 | case NK_Type_Narrowing: | ||||
9814 | // This was a floating-to-integer conversion, which is always considered a | ||||
9815 | // narrowing conversion even if the value is a constant and can be | ||||
9816 | // represented exactly as an integer. | ||||
9817 | S.Diag(PostInit->getBeginLoc(), NarrowingErrs(S.getLangOpts()) | ||||
9818 | ? diag::ext_init_list_type_narrowing | ||||
9819 | : diag::warn_init_list_type_narrowing) | ||||
9820 | << PostInit->getSourceRange() | ||||
9821 | << PreNarrowingType.getLocalUnqualifiedType() | ||||
9822 | << EntityType.getLocalUnqualifiedType(); | ||||
9823 | break; | ||||
9824 | |||||
9825 | case NK_Constant_Narrowing: | ||||
9826 | // A constant value was narrowed. | ||||
9827 | S.Diag(PostInit->getBeginLoc(), | ||||
9828 | NarrowingErrs(S.getLangOpts()) | ||||
9829 | ? diag::ext_init_list_constant_narrowing | ||||
9830 | : diag::warn_init_list_constant_narrowing) | ||||
9831 | << PostInit->getSourceRange() | ||||
9832 | << ConstantValue.getAsString(S.getASTContext(), ConstantType) | ||||
9833 | << EntityType.getLocalUnqualifiedType(); | ||||
9834 | break; | ||||
9835 | |||||
9836 | case NK_Variable_Narrowing: | ||||
9837 | // A variable's value may have been narrowed. | ||||
9838 | S.Diag(PostInit->getBeginLoc(), | ||||
9839 | NarrowingErrs(S.getLangOpts()) | ||||
9840 | ? diag::ext_init_list_variable_narrowing | ||||
9841 | : diag::warn_init_list_variable_narrowing) | ||||
9842 | << PostInit->getSourceRange() | ||||
9843 | << PreNarrowingType.getLocalUnqualifiedType() | ||||
9844 | << EntityType.getLocalUnqualifiedType(); | ||||
9845 | break; | ||||
9846 | } | ||||
9847 | |||||
9848 | SmallString<128> StaticCast; | ||||
9849 | llvm::raw_svector_ostream OS(StaticCast); | ||||
9850 | OS << "static_cast<"; | ||||
9851 | if (const TypedefType *TT = EntityType->getAs<TypedefType>()) { | ||||
9852 | // It's important to use the typedef's name if there is one so that the | ||||
9853 | // fixit doesn't break code using types like int64_t. | ||||
9854 | // | ||||
9855 | // FIXME: This will break if the typedef requires qualification. But | ||||
9856 | // getQualifiedNameAsString() includes non-machine-parsable components. | ||||
9857 | OS << *TT->getDecl(); | ||||
9858 | } else if (const BuiltinType *BT = EntityType->getAs<BuiltinType>()) | ||||
9859 | OS << BT->getName(S.getLangOpts()); | ||||
9860 | else { | ||||
9861 | // Oops, we didn't find the actual type of the variable. Don't emit a fixit | ||||
9862 | // with a broken cast. | ||||
9863 | return; | ||||
9864 | } | ||||
9865 | OS << ">("; | ||||
9866 | S.Diag(PostInit->getBeginLoc(), diag::note_init_list_narrowing_silence) | ||||
9867 | << PostInit->getSourceRange() | ||||
9868 | << FixItHint::CreateInsertion(PostInit->getBeginLoc(), OS.str()) | ||||
9869 | << FixItHint::CreateInsertion( | ||||
9870 | S.getLocForEndOfToken(PostInit->getEndLoc()), ")"); | ||||
9871 | } | ||||
9872 | |||||
9873 | //===----------------------------------------------------------------------===// | ||||
9874 | // Initialization helper functions | ||||
9875 | //===----------------------------------------------------------------------===// | ||||
9876 | bool | ||||
9877 | Sema::CanPerformCopyInitialization(const InitializedEntity &Entity, | ||||
9878 | ExprResult Init) { | ||||
9879 | if (Init.isInvalid()) | ||||
9880 | return false; | ||||
9881 | |||||
9882 | Expr *InitE = Init.get(); | ||||
9883 | assert(InitE && "No initialization expression")(static_cast <bool> (InitE && "No initialization expression" ) ? void (0) : __assert_fail ("InitE && \"No initialization expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9883, __extension__ __PRETTY_FUNCTION__)); | ||||
9884 | |||||
9885 | InitializationKind Kind = | ||||
9886 | InitializationKind::CreateCopy(InitE->getBeginLoc(), SourceLocation()); | ||||
9887 | InitializationSequence Seq(*this, Entity, Kind, InitE); | ||||
9888 | return !Seq.Failed(); | ||||
9889 | } | ||||
9890 | |||||
9891 | ExprResult | ||||
9892 | Sema::PerformCopyInitialization(const InitializedEntity &Entity, | ||||
9893 | SourceLocation EqualLoc, | ||||
9894 | ExprResult Init, | ||||
9895 | bool TopLevelOfInitList, | ||||
9896 | bool AllowExplicit) { | ||||
9897 | if (Init.isInvalid()) | ||||
9898 | return ExprError(); | ||||
9899 | |||||
9900 | Expr *InitE = Init.get(); | ||||
9901 | assert(InitE && "No initialization expression?")(static_cast <bool> (InitE && "No initialization expression?" ) ? void (0) : __assert_fail ("InitE && \"No initialization expression?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9901, __extension__ __PRETTY_FUNCTION__)); | ||||
9902 | |||||
9903 | if (EqualLoc.isInvalid()) | ||||
9904 | EqualLoc = InitE->getBeginLoc(); | ||||
9905 | |||||
9906 | InitializationKind Kind = InitializationKind::CreateCopy( | ||||
9907 | InitE->getBeginLoc(), EqualLoc, AllowExplicit); | ||||
9908 | InitializationSequence Seq(*this, Entity, Kind, InitE, TopLevelOfInitList); | ||||
9909 | |||||
9910 | // Prevent infinite recursion when performing parameter copy-initialization. | ||||
9911 | const bool ShouldTrackCopy = | ||||
9912 | Entity.isParameterKind() && Seq.isConstructorInitialization(); | ||||
9913 | if (ShouldTrackCopy) { | ||||
9914 | if (llvm::find(CurrentParameterCopyTypes, Entity.getType()) != | ||||
9915 | CurrentParameterCopyTypes.end()) { | ||||
9916 | Seq.SetOverloadFailure( | ||||
9917 | InitializationSequence::FK_ConstructorOverloadFailed, | ||||
9918 | OR_No_Viable_Function); | ||||
9919 | |||||
9920 | // Try to give a meaningful diagnostic note for the problematic | ||||
9921 | // constructor. | ||||
9922 | const auto LastStep = Seq.step_end() - 1; | ||||
9923 | assert(LastStep->Kind ==(static_cast <bool> (LastStep->Kind == InitializationSequence ::SK_ConstructorInitialization) ? void (0) : __assert_fail ("LastStep->Kind == InitializationSequence::SK_ConstructorInitialization" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9924, __extension__ __PRETTY_FUNCTION__)) | ||||
9924 | InitializationSequence::SK_ConstructorInitialization)(static_cast <bool> (LastStep->Kind == InitializationSequence ::SK_ConstructorInitialization) ? void (0) : __assert_fail ("LastStep->Kind == InitializationSequence::SK_ConstructorInitialization" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9924, __extension__ __PRETTY_FUNCTION__)); | ||||
9925 | const FunctionDecl *Function = LastStep->Function.Function; | ||||
9926 | auto Candidate = | ||||
9927 | llvm::find_if(Seq.getFailedCandidateSet(), | ||||
9928 | [Function](const OverloadCandidate &Candidate) -> bool { | ||||
9929 | return Candidate.Viable && | ||||
9930 | Candidate.Function == Function && | ||||
9931 | Candidate.Conversions.size() > 0; | ||||
9932 | }); | ||||
9933 | if (Candidate != Seq.getFailedCandidateSet().end() && | ||||
9934 | Function->getNumParams() > 0) { | ||||
9935 | Candidate->Viable = false; | ||||
9936 | Candidate->FailureKind = ovl_fail_bad_conversion; | ||||
9937 | Candidate->Conversions[0].setBad(BadConversionSequence::no_conversion, | ||||
9938 | InitE, | ||||
9939 | Function->getParamDecl(0)->getType()); | ||||
9940 | } | ||||
9941 | } | ||||
9942 | CurrentParameterCopyTypes.push_back(Entity.getType()); | ||||
9943 | } | ||||
9944 | |||||
9945 | ExprResult Result = Seq.Perform(*this, Entity, Kind, InitE); | ||||
9946 | |||||
9947 | if (ShouldTrackCopy) | ||||
9948 | CurrentParameterCopyTypes.pop_back(); | ||||
9949 | |||||
9950 | return Result; | ||||
9951 | } | ||||
9952 | |||||
9953 | /// Determine whether RD is, or is derived from, a specialization of CTD. | ||||
9954 | static bool isOrIsDerivedFromSpecializationOf(CXXRecordDecl *RD, | ||||
9955 | ClassTemplateDecl *CTD) { | ||||
9956 | auto NotSpecialization = [&] (const CXXRecordDecl *Candidate) { | ||||
9957 | auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Candidate); | ||||
9958 | return !CTSD || !declaresSameEntity(CTSD->getSpecializedTemplate(), CTD); | ||||
9959 | }; | ||||
9960 | return !(NotSpecialization(RD) && RD->forallBases(NotSpecialization)); | ||||
9961 | } | ||||
9962 | |||||
9963 | QualType Sema::DeduceTemplateSpecializationFromInitializer( | ||||
9964 | TypeSourceInfo *TSInfo, const InitializedEntity &Entity, | ||||
9965 | const InitializationKind &Kind, MultiExprArg Inits) { | ||||
9966 | auto *DeducedTST = dyn_cast<DeducedTemplateSpecializationType>( | ||||
9967 | TSInfo->getType()->getContainedDeducedType()); | ||||
9968 | assert(DeducedTST && "not a deduced template specialization type")(static_cast <bool> (DeducedTST && "not a deduced template specialization type" ) ? void (0) : __assert_fail ("DeducedTST && \"not a deduced template specialization type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaInit.cpp" , 9968, __extension__ __PRETTY_FUNCTION__)); | ||||
9969 | |||||
9970 | auto TemplateName = DeducedTST->getTemplateName(); | ||||
9971 | if (TemplateName.isDependent()) | ||||
9972 | return SubstAutoType(TSInfo->getType(), Context.DependentTy); | ||||
9973 | |||||
9974 | // We can only perform deduction for class templates. | ||||
9975 | auto *Template = | ||||
9976 | dyn_cast_or_null<ClassTemplateDecl>(TemplateName.getAsTemplateDecl()); | ||||
9977 | if (!Template) { | ||||
9978 | Diag(Kind.getLocation(), | ||||
9979 | diag::err_deduced_non_class_template_specialization_type) | ||||
9980 | << (int)getTemplateNameKindForDiagnostics(TemplateName) << TemplateName; | ||||
9981 | if (auto *TD = TemplateName.getAsTemplateDecl()) | ||||
9982 | Diag(TD->getLocation(), diag::note_template_decl_here); | ||||
9983 | return QualType(); | ||||
9984 | } | ||||
9985 | |||||
9986 | // Can't deduce from dependent arguments. | ||||
9987 | if (Expr::hasAnyTypeDependentArguments(Inits)) { | ||||
9988 | Diag(TSInfo->getTypeLoc().getBeginLoc(), | ||||
9989 | diag::warn_cxx14_compat_class_template_argument_deduction) | ||||
9990 | << TSInfo->getTypeLoc().getSourceRange() << 0; | ||||
9991 | return SubstAutoType(TSInfo->getType(), Context.DependentTy); | ||||
9992 | } | ||||
9993 | |||||
9994 | // FIXME: Perform "exact type" matching first, per CWG discussion? | ||||
9995 | // Or implement this via an implied 'T(T) -> T' deduction guide? | ||||
9996 | |||||
9997 | // FIXME: Do we need/want a std::initializer_list<T> special case? | ||||
9998 | |||||
9999 | // Look up deduction guides, including those synthesized from constructors. | ||||
10000 | // | ||||
10001 | // C++1z [over.match.class.deduct]p1: | ||||
10002 | // A set of functions and function templates is formed comprising: | ||||
10003 | // - For each constructor of the class template designated by the | ||||
10004 | // template-name, a function template [...] | ||||
10005 | // - For each deduction-guide, a function or function template [...] | ||||
10006 | DeclarationNameInfo NameInfo( | ||||
10007 | Context.DeclarationNames.getCXXDeductionGuideName(Template), | ||||
10008 | TSInfo->getTypeLoc().getEndLoc()); | ||||
10009 | LookupResult Guides(*this, NameInfo, LookupOrdinaryName); | ||||
10010 | LookupQualifiedName(Guides, Template->getDeclContext()); | ||||
10011 | |||||
10012 | // FIXME: Do not diagnose inaccessible deduction guides. The standard isn't | ||||
10013 | // clear on this, but they're not found by name so access does not apply. | ||||
10014 | Guides.suppressDiagnostics(); | ||||
10015 | |||||
10016 | // Figure out if this is list-initialization. | ||||
10017 | InitListExpr *ListInit = | ||||
10018 | (Inits.size() == 1 && Kind.getKind() != InitializationKind::IK_Direct) | ||||
10019 | ? dyn_cast<InitListExpr>(Inits[0]) | ||||
10020 | : nullptr; | ||||
10021 | |||||
10022 | // C++1z [over.match.class.deduct]p1: | ||||
10023 | // Initialization and overload resolution are performed as described in | ||||
10024 | // [dcl.init] and [over.match.ctor], [over.match.copy], or [over.match.list] | ||||
10025 | // (as appropriate for the type of initialization performed) for an object | ||||
10026 | // of a hypothetical class type, where the selected functions and function | ||||
10027 | // templates are considered to be the constructors of that class type | ||||
10028 | // | ||||
10029 | // Since we know we're initializing a class type of a type unrelated to that | ||||
10030 | // of the initializer, this reduces to something fairly reasonable. | ||||
10031 | OverloadCandidateSet Candidates(Kind.getLocation(), | ||||
10032 | OverloadCandidateSet::CSK_Normal); | ||||
10033 | OverloadCandidateSet::iterator Best; | ||||
10034 | |||||
10035 | bool HasAnyDeductionGuide = false; | ||||
10036 | bool AllowExplicit = !Kind.isCopyInit() || ListInit; | ||||
10037 | |||||
10038 | auto tryToResolveOverload = | ||||
10039 | [&](bool OnlyListConstructors) -> OverloadingResult { | ||||
10040 | Candidates.clear(OverloadCandidateSet::CSK_Normal); | ||||
10041 | HasAnyDeductionGuide = false; | ||||
10042 | |||||
10043 | for (auto I = Guides.begin(), E = Guides.end(); I != E; ++I) { | ||||
10044 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||
10045 | if (D->isInvalidDecl()) | ||||
10046 | continue; | ||||
10047 | |||||
10048 | auto *TD = dyn_cast<FunctionTemplateDecl>(D); | ||||
10049 | auto *GD = dyn_cast_or_null<CXXDeductionGuideDecl>( | ||||
10050 | TD ? TD->getTemplatedDecl() : dyn_cast<FunctionDecl>(D)); | ||||
10051 | if (!GD) | ||||
10052 | continue; | ||||
10053 | |||||
10054 | if (!GD->isImplicit()) | ||||
10055 | HasAnyDeductionGuide = true; | ||||
10056 | |||||
10057 | // C++ [over.match.ctor]p1: (non-list copy-initialization from non-class) | ||||
10058 | // For copy-initialization, the candidate functions are all the | ||||
10059 | // converting constructors (12.3.1) of that class. | ||||
10060 | // C++ [over.match.copy]p1: (non-list copy-initialization from class) | ||||
10061 | // The converting constructors of T are candidate functions. | ||||
10062 | if (!AllowExplicit) { | ||||
10063 | // Overload resolution checks whether the deduction guide is declared | ||||
10064 | // explicit for us. | ||||
10065 | |||||
10066 | // When looking for a converting constructor, deduction guides that | ||||
10067 | // could never be called with one argument are not interesting to | ||||
10068 | // check or note. | ||||
10069 | if (GD->getMinRequiredArguments() > 1 || | ||||
10070 | (GD->getNumParams() == 0 && !GD->isVariadic())) | ||||
10071 | continue; | ||||
10072 | } | ||||
10073 | |||||
10074 | // C++ [over.match.list]p1.1: (first phase list initialization) | ||||
10075 | // Initially, the candidate functions are the initializer-list | ||||
10076 | // constructors of the class T | ||||
10077 | if (OnlyListConstructors && !isInitListConstructor(GD)) | ||||
10078 | continue; | ||||
10079 | |||||
10080 | // C++ [over.match.list]p1.2: (second phase list initialization) | ||||
10081 | // the candidate functions are all the constructors of the class T | ||||
10082 | // C++ [over.match.ctor]p1: (all other cases) | ||||
10083 | // the candidate functions are all the constructors of the class of | ||||
10084 | // the object being initialized | ||||
10085 | |||||
10086 | // C++ [over.best.ics]p4: | ||||
10087 | // When [...] the constructor [...] is a candidate by | ||||
10088 | // - [over.match.copy] (in all cases) | ||||
10089 | // FIXME: The "second phase of [over.match.list] case can also | ||||
10090 | // theoretically happen here, but it's not clear whether we can | ||||
10091 | // ever have a parameter of the right type. | ||||
10092 | bool SuppressUserConversions = Kind.isCopyInit(); | ||||
10093 | |||||
10094 | if (TD) | ||||
10095 | AddTemplateOverloadCandidate(TD, I.getPair(), /*ExplicitArgs*/ nullptr, | ||||
10096 | Inits, Candidates, SuppressUserConversions, | ||||
10097 | /*PartialOverloading*/ false, | ||||
10098 | AllowExplicit); | ||||
10099 | else | ||||
10100 | AddOverloadCandidate(GD, I.getPair(), Inits, Candidates, | ||||
10101 | SuppressUserConversions, | ||||
10102 | /*PartialOverloading*/ false, AllowExplicit); | ||||
10103 | } | ||||
10104 | return Candidates.BestViableFunction(*this, Kind.getLocation(), Best); | ||||
10105 | }; | ||||
10106 | |||||
10107 | OverloadingResult Result = OR_No_Viable_Function; | ||||
10108 | |||||
10109 | // C++11 [over.match.list]p1, per DR1467: for list-initialization, first | ||||
10110 | // try initializer-list constructors. | ||||
10111 | if (ListInit) { | ||||
10112 | bool TryListConstructors = true; | ||||
10113 | |||||
10114 | // Try list constructors unless the list is empty and the class has one or | ||||
10115 | // more default constructors, in which case those constructors win. | ||||
10116 | if (!ListInit->getNumInits()) { | ||||
10117 | for (NamedDecl *D : Guides) { | ||||
10118 | auto *FD = dyn_cast<FunctionDecl>(D->getUnderlyingDecl()); | ||||
10119 | if (FD && FD->getMinRequiredArguments() == 0) { | ||||
10120 | TryListConstructors = false; | ||||
10121 | break; | ||||
10122 | } | ||||
10123 | } | ||||
10124 | } else if (ListInit->getNumInits() == 1) { | ||||
10125 | // C++ [over.match.class.deduct]: | ||||
10126 | // As an exception, the first phase in [over.match.list] (considering | ||||
10127 | // initializer-list constructors) is omitted if the initializer list | ||||
10128 | // consists of a single expression of type cv U, where U is a | ||||
10129 | // specialization of C or a class derived from a specialization of C. | ||||
10130 | Expr *E = ListInit->getInit(0); | ||||
10131 | auto *RD = E->getType()->getAsCXXRecordDecl(); | ||||
10132 | if (!isa<InitListExpr>(E) && RD && | ||||
10133 | isCompleteType(Kind.getLocation(), E->getType()) && | ||||
10134 | isOrIsDerivedFromSpecializationOf(RD, Template)) | ||||
10135 | TryListConstructors = false; | ||||
10136 | } | ||||
10137 | |||||
10138 | if (TryListConstructors) | ||||
10139 | Result = tryToResolveOverload(/*OnlyListConstructor*/true); | ||||
10140 | // Then unwrap the initializer list and try again considering all | ||||
10141 | // constructors. | ||||
10142 | Inits = MultiExprArg(ListInit->getInits(), ListInit->getNumInits()); | ||||
10143 | } | ||||
10144 | |||||
10145 | // If list-initialization fails, or if we're doing any other kind of | ||||
10146 | // initialization, we (eventually) consider constructors. | ||||
10147 | if (Result == OR_No_Viable_Function) | ||||
10148 | Result = tryToResolveOverload(/*OnlyListConstructor*/false); | ||||
10149 | |||||
10150 | switch (Result) { | ||||
10151 | case OR_Ambiguous: | ||||
10152 | // FIXME: For list-initialization candidates, it'd usually be better to | ||||
10153 | // list why they were not viable when given the initializer list itself as | ||||
10154 | // an argument. | ||||
10155 | Candidates.NoteCandidates( | ||||
10156 | PartialDiagnosticAt( | ||||
10157 | Kind.getLocation(), | ||||
10158 | PDiag(diag::err_deduced_class_template_ctor_ambiguous) | ||||
10159 | << TemplateName), | ||||
10160 | *this, OCD_AmbiguousCandidates, Inits); | ||||
10161 | return QualType(); | ||||
10162 | |||||
10163 | case OR_No_Viable_Function: { | ||||
10164 | CXXRecordDecl *Primary = | ||||
10165 | cast<ClassTemplateDecl>(Template)->getTemplatedDecl(); | ||||
10166 | bool Complete = | ||||
10167 | isCompleteType(Kind.getLocation(), Context.getTypeDeclType(Primary)); | ||||
10168 | Candidates.NoteCandidates( | ||||
10169 | PartialDiagnosticAt( | ||||
10170 | Kind.getLocation(), | ||||
10171 | PDiag(Complete ? diag::err_deduced_class_template_ctor_no_viable | ||||
10172 | : diag::err_deduced_class_template_incomplete) | ||||
10173 | << TemplateName << !Guides.empty()), | ||||
10174 | *this, OCD_AllCandidates, Inits); | ||||
10175 | return QualType(); | ||||
10176 | } | ||||
10177 | |||||
10178 | case OR_Deleted: { | ||||
10179 | Diag(Kind.getLocation(), diag::err_deduced_class_template_deleted) | ||||
10180 | << TemplateName; | ||||
10181 | NoteDeletedFunction(Best->Function); | ||||
10182 | return QualType(); | ||||
10183 | } | ||||
10184 | |||||
10185 | case OR_Success: | ||||
10186 | // C++ [over.match.list]p1: | ||||
10187 | // In copy-list-initialization, if an explicit constructor is chosen, the | ||||
10188 | // initialization is ill-formed. | ||||
10189 | if (Kind.isCopyInit() && ListInit && | ||||
10190 | cast<CXXDeductionGuideDecl>(Best->Function)->isExplicit()) { | ||||
10191 | bool IsDeductionGuide = !Best->Function->isImplicit(); | ||||
10192 | Diag(Kind.getLocation(), diag::err_deduced_class_template_explicit) | ||||
10193 | << TemplateName << IsDeductionGuide; | ||||
10194 | Diag(Best->Function->getLocation(), | ||||
10195 | diag::note_explicit_ctor_deduction_guide_here) | ||||
10196 | << IsDeductionGuide; | ||||
10197 | return QualType(); | ||||
10198 | } | ||||
10199 | |||||
10200 | // Make sure we didn't select an unusable deduction guide, and mark it | ||||
10201 | // as referenced. | ||||
10202 | DiagnoseUseOfDecl(Best->Function, Kind.getLocation()); | ||||
10203 | MarkFunctionReferenced(Kind.getLocation(), Best->Function); | ||||
10204 | break; | ||||
10205 | } | ||||
10206 | |||||
10207 | // C++ [dcl.type.class.deduct]p1: | ||||
10208 | // The placeholder is replaced by the return type of the function selected | ||||
10209 | // by overload resolution for class template deduction. | ||||
10210 | QualType DeducedType = | ||||
10211 | SubstAutoType(TSInfo->getType(), Best->Function->getReturnType()); | ||||
10212 | Diag(TSInfo->getTypeLoc().getBeginLoc(), | ||||
10213 | diag::warn_cxx14_compat_class_template_argument_deduction) | ||||
10214 | << TSInfo->getTypeLoc().getSourceRange() << 1 << DeducedType; | ||||
10215 | |||||
10216 | // Warn if CTAD was used on a type that does not have any user-defined | ||||
10217 | // deduction guides. | ||||
10218 | if (!HasAnyDeductionGuide) { | ||||
10219 | Diag(TSInfo->getTypeLoc().getBeginLoc(), | ||||
10220 | diag::warn_ctad_maybe_unsupported) | ||||
10221 | << TemplateName; | ||||
10222 | Diag(Template->getLocation(), diag::note_suppress_ctad_maybe_unsupported); | ||||
10223 | } | ||||
10224 | |||||
10225 | return DeducedType; | ||||
10226 | } |
1 | //===--- Expr.h - Classes for representing expressions ----------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the Expr interface and subclasses. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CLANG_AST_EXPR_H |
14 | #define LLVM_CLANG_AST_EXPR_H |
15 | |
16 | #include "clang/AST/APValue.h" |
17 | #include "clang/AST/ASTVector.h" |
18 | #include "clang/AST/ComputeDependence.h" |
19 | #include "clang/AST/Decl.h" |
20 | #include "clang/AST/DeclAccessPair.h" |
21 | #include "clang/AST/DependenceFlags.h" |
22 | #include "clang/AST/OperationKinds.h" |
23 | #include "clang/AST/Stmt.h" |
24 | #include "clang/AST/TemplateBase.h" |
25 | #include "clang/AST/Type.h" |
26 | #include "clang/Basic/CharInfo.h" |
27 | #include "clang/Basic/LangOptions.h" |
28 | #include "clang/Basic/SyncScope.h" |
29 | #include "clang/Basic/TypeTraits.h" |
30 | #include "llvm/ADT/APFloat.h" |
31 | #include "llvm/ADT/APSInt.h" |
32 | #include "llvm/ADT/SmallVector.h" |
33 | #include "llvm/ADT/StringRef.h" |
34 | #include "llvm/ADT/iterator.h" |
35 | #include "llvm/ADT/iterator_range.h" |
36 | #include "llvm/Support/AtomicOrdering.h" |
37 | #include "llvm/Support/Compiler.h" |
38 | #include "llvm/Support/TrailingObjects.h" |
39 | |
40 | namespace clang { |
41 | class APValue; |
42 | class ASTContext; |
43 | class BlockDecl; |
44 | class CXXBaseSpecifier; |
45 | class CXXMemberCallExpr; |
46 | class CXXOperatorCallExpr; |
47 | class CastExpr; |
48 | class Decl; |
49 | class IdentifierInfo; |
50 | class MaterializeTemporaryExpr; |
51 | class NamedDecl; |
52 | class ObjCPropertyRefExpr; |
53 | class OpaqueValueExpr; |
54 | class ParmVarDecl; |
55 | class StringLiteral; |
56 | class TargetInfo; |
57 | class ValueDecl; |
58 | |
59 | /// A simple array of base specifiers. |
60 | typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; |
61 | |
62 | /// An adjustment to be made to the temporary created when emitting a |
63 | /// reference binding, which accesses a particular subobject of that temporary. |
64 | struct SubobjectAdjustment { |
65 | enum { |
66 | DerivedToBaseAdjustment, |
67 | FieldAdjustment, |
68 | MemberPointerAdjustment |
69 | } Kind; |
70 | |
71 | struct DTB { |
72 | const CastExpr *BasePath; |
73 | const CXXRecordDecl *DerivedClass; |
74 | }; |
75 | |
76 | struct P { |
77 | const MemberPointerType *MPT; |
78 | Expr *RHS; |
79 | }; |
80 | |
81 | union { |
82 | struct DTB DerivedToBase; |
83 | FieldDecl *Field; |
84 | struct P Ptr; |
85 | }; |
86 | |
87 | SubobjectAdjustment(const CastExpr *BasePath, |
88 | const CXXRecordDecl *DerivedClass) |
89 | : Kind(DerivedToBaseAdjustment) { |
90 | DerivedToBase.BasePath = BasePath; |
91 | DerivedToBase.DerivedClass = DerivedClass; |
92 | } |
93 | |
94 | SubobjectAdjustment(FieldDecl *Field) |
95 | : Kind(FieldAdjustment) { |
96 | this->Field = Field; |
97 | } |
98 | |
99 | SubobjectAdjustment(const MemberPointerType *MPT, Expr *RHS) |
100 | : Kind(MemberPointerAdjustment) { |
101 | this->Ptr.MPT = MPT; |
102 | this->Ptr.RHS = RHS; |
103 | } |
104 | }; |
105 | |
106 | /// This represents one expression. Note that Expr's are subclasses of Stmt. |
107 | /// This allows an expression to be transparently used any place a Stmt is |
108 | /// required. |
109 | class Expr : public ValueStmt { |
110 | QualType TR; |
111 | |
112 | public: |
113 | Expr() = delete; |
114 | Expr(const Expr&) = delete; |
115 | Expr(Expr &&) = delete; |
116 | Expr &operator=(const Expr&) = delete; |
117 | Expr &operator=(Expr&&) = delete; |
118 | |
119 | protected: |
120 | Expr(StmtClass SC, QualType T, ExprValueKind VK, ExprObjectKind OK) |
121 | : ValueStmt(SC) { |
122 | ExprBits.Dependent = 0; |
123 | ExprBits.ValueKind = VK; |
124 | ExprBits.ObjectKind = OK; |
125 | assert(ExprBits.ObjectKind == OK && "truncated kind")(static_cast <bool> (ExprBits.ObjectKind == OK && "truncated kind") ? void (0) : __assert_fail ("ExprBits.ObjectKind == OK && \"truncated kind\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 125, __extension__ __PRETTY_FUNCTION__)); |
126 | setType(T); |
127 | } |
128 | |
129 | /// Construct an empty expression. |
130 | explicit Expr(StmtClass SC, EmptyShell) : ValueStmt(SC) { } |
131 | |
132 | /// Each concrete expr subclass is expected to compute its dependence and call |
133 | /// this in the constructor. |
134 | void setDependence(ExprDependence Deps) { |
135 | ExprBits.Dependent = static_cast<unsigned>(Deps); |
136 | } |
137 | friend class ASTImporter; // Sets dependence dircetly. |
138 | friend class ASTStmtReader; // Sets dependence dircetly. |
139 | |
140 | public: |
141 | QualType getType() const { return TR; } |
142 | void setType(QualType t) { |
143 | // In C++, the type of an expression is always adjusted so that it |
144 | // will not have reference type (C++ [expr]p6). Use |
145 | // QualType::getNonReferenceType() to retrieve the non-reference |
146 | // type. Additionally, inspect Expr::isLvalue to determine whether |
147 | // an expression that is adjusted in this manner should be |
148 | // considered an lvalue. |
149 | assert((t.isNull() || !t->isReferenceType()) &&(static_cast <bool> ((t.isNull() || !t->isReferenceType ()) && "Expressions can't have reference type") ? void (0) : __assert_fail ("(t.isNull() || !t->isReferenceType()) && \"Expressions can't have reference type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 150, __extension__ __PRETTY_FUNCTION__)) |
150 | "Expressions can't have reference type")(static_cast <bool> ((t.isNull() || !t->isReferenceType ()) && "Expressions can't have reference type") ? void (0) : __assert_fail ("(t.isNull() || !t->isReferenceType()) && \"Expressions can't have reference type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 150, __extension__ __PRETTY_FUNCTION__)); |
151 | |
152 | TR = t; |
153 | } |
154 | |
155 | ExprDependence getDependence() const { |
156 | return static_cast<ExprDependence>(ExprBits.Dependent); |
157 | } |
158 | |
159 | /// Determines whether the value of this expression depends on |
160 | /// - a template parameter (C++ [temp.dep.constexpr]) |
161 | /// - or an error, whose resolution is unknown |
162 | /// |
163 | /// For example, the array bound of "Chars" in the following example is |
164 | /// value-dependent. |
165 | /// @code |
166 | /// template<int Size, char (&Chars)[Size]> struct meta_string; |
167 | /// @endcode |
168 | bool isValueDependent() const { |
169 | return static_cast<bool>(getDependence() & ExprDependence::Value); |
170 | } |
171 | |
172 | /// Determines whether the type of this expression depends on |
173 | /// - a template paramter (C++ [temp.dep.expr], which means that its type |
174 | /// could change from one template instantiation to the next) |
175 | /// - or an error |
176 | /// |
177 | /// For example, the expressions "x" and "x + y" are type-dependent in |
178 | /// the following code, but "y" is not type-dependent: |
179 | /// @code |
180 | /// template<typename T> |
181 | /// void add(T x, int y) { |
182 | /// x + y; |
183 | /// } |
184 | /// @endcode |
185 | bool isTypeDependent() const { |
186 | return static_cast<bool>(getDependence() & ExprDependence::Type); |
187 | } |
188 | |
189 | /// Whether this expression is instantiation-dependent, meaning that |
190 | /// it depends in some way on |
191 | /// - a template parameter (even if neither its type nor (constant) value |
192 | /// can change due to the template instantiation) |
193 | /// - or an error |
194 | /// |
195 | /// In the following example, the expression \c sizeof(sizeof(T() + T())) is |
196 | /// instantiation-dependent (since it involves a template parameter \c T), but |
197 | /// is neither type- nor value-dependent, since the type of the inner |
198 | /// \c sizeof is known (\c std::size_t) and therefore the size of the outer |
199 | /// \c sizeof is known. |
200 | /// |
201 | /// \code |
202 | /// template<typename T> |
203 | /// void f(T x, T y) { |
204 | /// sizeof(sizeof(T() + T()); |
205 | /// } |
206 | /// \endcode |
207 | /// |
208 | /// \code |
209 | /// void func(int) { |
210 | /// func(); // the expression is instantiation-dependent, because it depends |
211 | /// // on an error. |
212 | /// } |
213 | /// \endcode |
214 | bool isInstantiationDependent() const { |
215 | return static_cast<bool>(getDependence() & ExprDependence::Instantiation); |
216 | } |
217 | |
218 | /// Whether this expression contains an unexpanded parameter |
219 | /// pack (for C++11 variadic templates). |
220 | /// |
221 | /// Given the following function template: |
222 | /// |
223 | /// \code |
224 | /// template<typename F, typename ...Types> |
225 | /// void forward(const F &f, Types &&...args) { |
226 | /// f(static_cast<Types&&>(args)...); |
227 | /// } |
228 | /// \endcode |
229 | /// |
230 | /// The expressions \c args and \c static_cast<Types&&>(args) both |
231 | /// contain parameter packs. |
232 | bool containsUnexpandedParameterPack() const { |
233 | return static_cast<bool>(getDependence() & ExprDependence::UnexpandedPack); |
234 | } |
235 | |
236 | /// Whether this expression contains subexpressions which had errors, e.g. a |
237 | /// TypoExpr. |
238 | bool containsErrors() const { |
239 | return static_cast<bool>(getDependence() & ExprDependence::Error); |
240 | } |
241 | |
242 | /// getExprLoc - Return the preferred location for the arrow when diagnosing |
243 | /// a problem with a generic expression. |
244 | SourceLocation getExprLoc() const LLVM_READONLY__attribute__((__pure__)); |
245 | |
246 | /// Determine whether an lvalue-to-rvalue conversion should implicitly be |
247 | /// applied to this expression if it appears as a discarded-value expression |
248 | /// in C++11 onwards. This applies to certain forms of volatile glvalues. |
249 | bool isReadIfDiscardedInCPlusPlus11() const; |
250 | |
251 | /// isUnusedResultAWarning - Return true if this immediate expression should |
252 | /// be warned about if the result is unused. If so, fill in expr, location, |
253 | /// and ranges with expr to warn on and source locations/ranges appropriate |
254 | /// for a warning. |
255 | bool isUnusedResultAWarning(const Expr *&WarnExpr, SourceLocation &Loc, |
256 | SourceRange &R1, SourceRange &R2, |
257 | ASTContext &Ctx) const; |
258 | |
259 | /// isLValue - True if this expression is an "l-value" according to |
260 | /// the rules of the current language. C and C++ give somewhat |
261 | /// different rules for this concept, but in general, the result of |
262 | /// an l-value expression identifies a specific object whereas the |
263 | /// result of an r-value expression is a value detached from any |
264 | /// specific storage. |
265 | /// |
266 | /// C++11 divides the concept of "r-value" into pure r-values |
267 | /// ("pr-values") and so-called expiring values ("x-values"), which |
268 | /// identify specific objects that can be safely cannibalized for |
269 | /// their resources. |
270 | bool isLValue() const { return getValueKind() == VK_LValue; } |
271 | bool isPRValue() const { return getValueKind() == VK_PRValue; } |
272 | bool isXValue() const { return getValueKind() == VK_XValue; } |
273 | bool isGLValue() const { return getValueKind() != VK_PRValue; } |
274 | |
275 | enum LValueClassification { |
276 | LV_Valid, |
277 | LV_NotObjectType, |
278 | LV_IncompleteVoidType, |
279 | LV_DuplicateVectorComponents, |
280 | LV_InvalidExpression, |
281 | LV_InvalidMessageExpression, |
282 | LV_MemberFunction, |
283 | LV_SubObjCPropertySetting, |
284 | LV_ClassTemporary, |
285 | LV_ArrayTemporary |
286 | }; |
287 | /// Reasons why an expression might not be an l-value. |
288 | LValueClassification ClassifyLValue(ASTContext &Ctx) const; |
289 | |
290 | enum isModifiableLvalueResult { |
291 | MLV_Valid, |
292 | MLV_NotObjectType, |
293 | MLV_IncompleteVoidType, |
294 | MLV_DuplicateVectorComponents, |
295 | MLV_InvalidExpression, |
296 | MLV_LValueCast, // Specialized form of MLV_InvalidExpression. |
297 | MLV_IncompleteType, |
298 | MLV_ConstQualified, |
299 | MLV_ConstQualifiedField, |
300 | MLV_ConstAddrSpace, |
301 | MLV_ArrayType, |
302 | MLV_NoSetterProperty, |
303 | MLV_MemberFunction, |
304 | MLV_SubObjCPropertySetting, |
305 | MLV_InvalidMessageExpression, |
306 | MLV_ClassTemporary, |
307 | MLV_ArrayTemporary |
308 | }; |
309 | /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, |
310 | /// does not have an incomplete type, does not have a const-qualified type, |
311 | /// and if it is a structure or union, does not have any member (including, |
312 | /// recursively, any member or element of all contained aggregates or unions) |
313 | /// with a const-qualified type. |
314 | /// |
315 | /// \param Loc [in,out] - A source location which *may* be filled |
316 | /// in with the location of the expression making this a |
317 | /// non-modifiable lvalue, if specified. |
318 | isModifiableLvalueResult |
319 | isModifiableLvalue(ASTContext &Ctx, SourceLocation *Loc = nullptr) const; |
320 | |
321 | /// The return type of classify(). Represents the C++11 expression |
322 | /// taxonomy. |
323 | class Classification { |
324 | public: |
325 | /// The various classification results. Most of these mean prvalue. |
326 | enum Kinds { |
327 | CL_LValue, |
328 | CL_XValue, |
329 | CL_Function, // Functions cannot be lvalues in C. |
330 | CL_Void, // Void cannot be an lvalue in C. |
331 | CL_AddressableVoid, // Void expression whose address can be taken in C. |
332 | CL_DuplicateVectorComponents, // A vector shuffle with dupes. |
333 | CL_MemberFunction, // An expression referring to a member function |
334 | CL_SubObjCPropertySetting, |
335 | CL_ClassTemporary, // A temporary of class type, or subobject thereof. |
336 | CL_ArrayTemporary, // A temporary of array type. |
337 | CL_ObjCMessageRValue, // ObjC message is an rvalue |
338 | CL_PRValue // A prvalue for any other reason, of any other type |
339 | }; |
340 | /// The results of modification testing. |
341 | enum ModifiableType { |
342 | CM_Untested, // testModifiable was false. |
343 | CM_Modifiable, |
344 | CM_RValue, // Not modifiable because it's an rvalue |
345 | CM_Function, // Not modifiable because it's a function; C++ only |
346 | CM_LValueCast, // Same as CM_RValue, but indicates GCC cast-as-lvalue ext |
347 | CM_NoSetterProperty,// Implicit assignment to ObjC property without setter |
348 | CM_ConstQualified, |
349 | CM_ConstQualifiedField, |
350 | CM_ConstAddrSpace, |
351 | CM_ArrayType, |
352 | CM_IncompleteType |
353 | }; |
354 | |
355 | private: |
356 | friend class Expr; |
357 | |
358 | unsigned short Kind; |
359 | unsigned short Modifiable; |
360 | |
361 | explicit Classification(Kinds k, ModifiableType m) |
362 | : Kind(k), Modifiable(m) |
363 | {} |
364 | |
365 | public: |
366 | Classification() {} |
367 | |
368 | Kinds getKind() const { return static_cast<Kinds>(Kind); } |
369 | ModifiableType getModifiable() const { |
370 | assert(Modifiable != CM_Untested && "Did not test for modifiability.")(static_cast <bool> (Modifiable != CM_Untested && "Did not test for modifiability.") ? void (0) : __assert_fail ("Modifiable != CM_Untested && \"Did not test for modifiability.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 370, __extension__ __PRETTY_FUNCTION__)); |
371 | return static_cast<ModifiableType>(Modifiable); |
372 | } |
373 | bool isLValue() const { return Kind == CL_LValue; } |
374 | bool isXValue() const { return Kind == CL_XValue; } |
375 | bool isGLValue() const { return Kind <= CL_XValue; } |
376 | bool isPRValue() const { return Kind >= CL_Function; } |
377 | bool isRValue() const { return Kind >= CL_XValue; } |
378 | bool isModifiable() const { return getModifiable() == CM_Modifiable; } |
379 | |
380 | /// Create a simple, modifiably lvalue |
381 | static Classification makeSimpleLValue() { |
382 | return Classification(CL_LValue, CM_Modifiable); |
383 | } |
384 | |
385 | }; |
386 | /// Classify - Classify this expression according to the C++11 |
387 | /// expression taxonomy. |
388 | /// |
389 | /// C++11 defines ([basic.lval]) a new taxonomy of expressions to replace the |
390 | /// old lvalue vs rvalue. This function determines the type of expression this |
391 | /// is. There are three expression types: |
392 | /// - lvalues are classical lvalues as in C++03. |
393 | /// - prvalues are equivalent to rvalues in C++03. |
394 | /// - xvalues are expressions yielding unnamed rvalue references, e.g. a |
395 | /// function returning an rvalue reference. |
396 | /// lvalues and xvalues are collectively referred to as glvalues, while |
397 | /// prvalues and xvalues together form rvalues. |
398 | Classification Classify(ASTContext &Ctx) const { |
399 | return ClassifyImpl(Ctx, nullptr); |
400 | } |
401 | |
402 | /// ClassifyModifiable - Classify this expression according to the |
403 | /// C++11 expression taxonomy, and see if it is valid on the left side |
404 | /// of an assignment. |
405 | /// |
406 | /// This function extends classify in that it also tests whether the |
407 | /// expression is modifiable (C99 6.3.2.1p1). |
408 | /// \param Loc A source location that might be filled with a relevant location |
409 | /// if the expression is not modifiable. |
410 | Classification ClassifyModifiable(ASTContext &Ctx, SourceLocation &Loc) const{ |
411 | return ClassifyImpl(Ctx, &Loc); |
412 | } |
413 | |
414 | /// Returns the set of floating point options that apply to this expression. |
415 | /// Only meaningful for operations on floating point values. |
416 | FPOptions getFPFeaturesInEffect(const LangOptions &LO) const; |
417 | |
418 | /// getValueKindForType - Given a formal return or parameter type, |
419 | /// give its value kind. |
420 | static ExprValueKind getValueKindForType(QualType T) { |
421 | if (const ReferenceType *RT = T->getAs<ReferenceType>()) |
422 | return (isa<LValueReferenceType>(RT) |
423 | ? VK_LValue |
424 | : (RT->getPointeeType()->isFunctionType() |
425 | ? VK_LValue : VK_XValue)); |
426 | return VK_PRValue; |
427 | } |
428 | |
429 | /// getValueKind - The value kind that this expression produces. |
430 | ExprValueKind getValueKind() const { |
431 | return static_cast<ExprValueKind>(ExprBits.ValueKind); |
432 | } |
433 | |
434 | /// getObjectKind - The object kind that this expression produces. |
435 | /// Object kinds are meaningful only for expressions that yield an |
436 | /// l-value or x-value. |
437 | ExprObjectKind getObjectKind() const { |
438 | return static_cast<ExprObjectKind>(ExprBits.ObjectKind); |
439 | } |
440 | |
441 | bool isOrdinaryOrBitFieldObject() const { |
442 | ExprObjectKind OK = getObjectKind(); |
443 | return (OK == OK_Ordinary || OK == OK_BitField); |
444 | } |
445 | |
446 | /// setValueKind - Set the value kind produced by this expression. |
447 | void setValueKind(ExprValueKind Cat) { ExprBits.ValueKind = Cat; } |
448 | |
449 | /// setObjectKind - Set the object kind produced by this expression. |
450 | void setObjectKind(ExprObjectKind Cat) { ExprBits.ObjectKind = Cat; } |
451 | |
452 | private: |
453 | Classification ClassifyImpl(ASTContext &Ctx, SourceLocation *Loc) const; |
454 | |
455 | public: |
456 | |
457 | /// Returns true if this expression is a gl-value that |
458 | /// potentially refers to a bit-field. |
459 | /// |
460 | /// In C++, whether a gl-value refers to a bitfield is essentially |
461 | /// an aspect of the value-kind type system. |
462 | bool refersToBitField() const { return getObjectKind() == OK_BitField; } |
463 | |
464 | /// If this expression refers to a bit-field, retrieve the |
465 | /// declaration of that bit-field. |
466 | /// |
467 | /// Note that this returns a non-null pointer in subtly different |
468 | /// places than refersToBitField returns true. In particular, this can |
469 | /// return a non-null pointer even for r-values loaded from |
470 | /// bit-fields, but it will return null for a conditional bit-field. |
471 | FieldDecl *getSourceBitField(); |
472 | |
473 | const FieldDecl *getSourceBitField() const { |
474 | return const_cast<Expr*>(this)->getSourceBitField(); |
475 | } |
476 | |
477 | Decl *getReferencedDeclOfCallee(); |
478 | const Decl *getReferencedDeclOfCallee() const { |
479 | return const_cast<Expr*>(this)->getReferencedDeclOfCallee(); |
480 | } |
481 | |
482 | /// If this expression is an l-value for an Objective C |
483 | /// property, find the underlying property reference expression. |
484 | const ObjCPropertyRefExpr *getObjCProperty() const; |
485 | |
486 | /// Check if this expression is the ObjC 'self' implicit parameter. |
487 | bool isObjCSelfExpr() const; |
488 | |
489 | /// Returns whether this expression refers to a vector element. |
490 | bool refersToVectorElement() const; |
491 | |
492 | /// Returns whether this expression refers to a matrix element. |
493 | bool refersToMatrixElement() const { |
494 | return getObjectKind() == OK_MatrixComponent; |
495 | } |
496 | |
497 | /// Returns whether this expression refers to a global register |
498 | /// variable. |
499 | bool refersToGlobalRegisterVar() const; |
500 | |
501 | /// Returns whether this expression has a placeholder type. |
502 | bool hasPlaceholderType() const { |
503 | return getType()->isPlaceholderType(); |
504 | } |
505 | |
506 | /// Returns whether this expression has a specific placeholder type. |
507 | bool hasPlaceholderType(BuiltinType::Kind K) const { |
508 | assert(BuiltinType::isPlaceholderTypeKind(K))(static_cast <bool> (BuiltinType::isPlaceholderTypeKind (K)) ? void (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind(K)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 508, __extension__ __PRETTY_FUNCTION__)); |
509 | if (const BuiltinType *BT = dyn_cast<BuiltinType>(getType())) |
510 | return BT->getKind() == K; |
511 | return false; |
512 | } |
513 | |
514 | /// isKnownToHaveBooleanValue - Return true if this is an integer expression |
515 | /// that is known to return 0 or 1. This happens for _Bool/bool expressions |
516 | /// but also int expressions which are produced by things like comparisons in |
517 | /// C. |
518 | /// |
519 | /// \param Semantic If true, only return true for expressions that are known |
520 | /// to be semantically boolean, which might not be true even for expressions |
521 | /// that are known to evaluate to 0/1. For instance, reading an unsigned |
522 | /// bit-field with width '1' will evaluate to 0/1, but doesn't necessarily |
523 | /// semantically correspond to a bool. |
524 | bool isKnownToHaveBooleanValue(bool Semantic = true) const; |
525 | |
526 | /// isIntegerConstantExpr - Return the value if this expression is a valid |
527 | /// integer constant expression. If not a valid i-c-e, return None and fill |
528 | /// in Loc (if specified) with the location of the invalid expression. |
529 | /// |
530 | /// Note: This does not perform the implicit conversions required by C++11 |
531 | /// [expr.const]p5. |
532 | Optional<llvm::APSInt> getIntegerConstantExpr(const ASTContext &Ctx, |
533 | SourceLocation *Loc = nullptr, |
534 | bool isEvaluated = true) const; |
535 | bool isIntegerConstantExpr(const ASTContext &Ctx, |
536 | SourceLocation *Loc = nullptr) const; |
537 | |
538 | /// isCXX98IntegralConstantExpr - Return true if this expression is an |
539 | /// integral constant expression in C++98. Can only be used in C++. |
540 | bool isCXX98IntegralConstantExpr(const ASTContext &Ctx) const; |
541 | |
542 | /// isCXX11ConstantExpr - Return true if this expression is a constant |
543 | /// expression in C++11. Can only be used in C++. |
544 | /// |
545 | /// Note: This does not perform the implicit conversions required by C++11 |
546 | /// [expr.const]p5. |
547 | bool isCXX11ConstantExpr(const ASTContext &Ctx, APValue *Result = nullptr, |
548 | SourceLocation *Loc = nullptr) const; |
549 | |
550 | /// isPotentialConstantExpr - Return true if this function's definition |
551 | /// might be usable in a constant expression in C++11, if it were marked |
552 | /// constexpr. Return false if the function can never produce a constant |
553 | /// expression, along with diagnostics describing why not. |
554 | static bool isPotentialConstantExpr(const FunctionDecl *FD, |
555 | SmallVectorImpl< |
556 | PartialDiagnosticAt> &Diags); |
557 | |
558 | /// isPotentialConstantExprUnevaluted - Return true if this expression might |
559 | /// be usable in a constant expression in C++11 in an unevaluated context, if |
560 | /// it were in function FD marked constexpr. Return false if the function can |
561 | /// never produce a constant expression, along with diagnostics describing |
562 | /// why not. |
563 | static bool isPotentialConstantExprUnevaluated(Expr *E, |
564 | const FunctionDecl *FD, |
565 | SmallVectorImpl< |
566 | PartialDiagnosticAt> &Diags); |
567 | |
568 | /// isConstantInitializer - Returns true if this expression can be emitted to |
569 | /// IR as a constant, and thus can be used as a constant initializer in C. |
570 | /// If this expression is not constant and Culprit is non-null, |
571 | /// it is used to store the address of first non constant expr. |
572 | bool isConstantInitializer(ASTContext &Ctx, bool ForRef, |
573 | const Expr **Culprit = nullptr) const; |
574 | |
575 | /// EvalStatus is a struct with detailed info about an evaluation in progress. |
576 | struct EvalStatus { |
577 | /// Whether the evaluated expression has side effects. |
578 | /// For example, (f() && 0) can be folded, but it still has side effects. |
579 | bool HasSideEffects; |
580 | |
581 | /// Whether the evaluation hit undefined behavior. |
582 | /// For example, 1.0 / 0.0 can be folded to Inf, but has undefined behavior. |
583 | /// Likewise, INT_MAX + 1 can be folded to INT_MIN, but has UB. |
584 | bool HasUndefinedBehavior; |
585 | |
586 | /// Diag - If this is non-null, it will be filled in with a stack of notes |
587 | /// indicating why evaluation failed (or why it failed to produce a constant |
588 | /// expression). |
589 | /// If the expression is unfoldable, the notes will indicate why it's not |
590 | /// foldable. If the expression is foldable, but not a constant expression, |
591 | /// the notes will describes why it isn't a constant expression. If the |
592 | /// expression *is* a constant expression, no notes will be produced. |
593 | SmallVectorImpl<PartialDiagnosticAt> *Diag; |
594 | |
595 | EvalStatus() |
596 | : HasSideEffects(false), HasUndefinedBehavior(false), Diag(nullptr) {} |
597 | |
598 | // hasSideEffects - Return true if the evaluated expression has |
599 | // side effects. |
600 | bool hasSideEffects() const { |
601 | return HasSideEffects; |
602 | } |
603 | }; |
604 | |
605 | /// EvalResult is a struct with detailed info about an evaluated expression. |
606 | struct EvalResult : EvalStatus { |
607 | /// Val - This is the value the expression can be folded to. |
608 | APValue Val; |
609 | |
610 | // isGlobalLValue - Return true if the evaluated lvalue expression |
611 | // is global. |
612 | bool isGlobalLValue() const; |
613 | }; |
614 | |
615 | /// EvaluateAsRValue - Return true if this is a constant which we can fold to |
616 | /// an rvalue using any crazy technique (that has nothing to do with language |
617 | /// standards) that we want to, even if the expression has side-effects. If |
618 | /// this function returns true, it returns the folded constant in Result. If |
619 | /// the expression is a glvalue, an lvalue-to-rvalue conversion will be |
620 | /// applied. |
621 | bool EvaluateAsRValue(EvalResult &Result, const ASTContext &Ctx, |
622 | bool InConstantContext = false) const; |
623 | |
624 | /// EvaluateAsBooleanCondition - Return true if this is a constant |
625 | /// which we can fold and convert to a boolean condition using |
626 | /// any crazy technique that we want to, even if the expression has |
627 | /// side-effects. |
628 | bool EvaluateAsBooleanCondition(bool &Result, const ASTContext &Ctx, |
629 | bool InConstantContext = false) const; |
630 | |
631 | enum SideEffectsKind { |
632 | SE_NoSideEffects, ///< Strictly evaluate the expression. |
633 | SE_AllowUndefinedBehavior, ///< Allow UB that we can give a value, but not |
634 | ///< arbitrary unmodeled side effects. |
635 | SE_AllowSideEffects ///< Allow any unmodeled side effect. |
636 | }; |
637 | |
638 | /// EvaluateAsInt - Return true if this is a constant which we can fold and |
639 | /// convert to an integer, using any crazy technique that we want to. |
640 | bool EvaluateAsInt(EvalResult &Result, const ASTContext &Ctx, |
641 | SideEffectsKind AllowSideEffects = SE_NoSideEffects, |
642 | bool InConstantContext = false) const; |
643 | |
644 | /// EvaluateAsFloat - Return true if this is a constant which we can fold and |
645 | /// convert to a floating point value, using any crazy technique that we |
646 | /// want to. |
647 | bool EvaluateAsFloat(llvm::APFloat &Result, const ASTContext &Ctx, |
648 | SideEffectsKind AllowSideEffects = SE_NoSideEffects, |
649 | bool InConstantContext = false) const; |
650 | |
651 | /// EvaluateAsFloat - Return true if this is a constant which we can fold and |
652 | /// convert to a fixed point value. |
653 | bool EvaluateAsFixedPoint(EvalResult &Result, const ASTContext &Ctx, |
654 | SideEffectsKind AllowSideEffects = SE_NoSideEffects, |
655 | bool InConstantContext = false) const; |
656 | |
657 | /// isEvaluatable - Call EvaluateAsRValue to see if this expression can be |
658 | /// constant folded without side-effects, but discard the result. |
659 | bool isEvaluatable(const ASTContext &Ctx, |
660 | SideEffectsKind AllowSideEffects = SE_NoSideEffects) const; |
661 | |
662 | /// HasSideEffects - This routine returns true for all those expressions |
663 | /// which have any effect other than producing a value. Example is a function |
664 | /// call, volatile variable read, or throwing an exception. If |
665 | /// IncludePossibleEffects is false, this call treats certain expressions with |
666 | /// potential side effects (such as function call-like expressions, |
667 | /// instantiation-dependent expressions, or invocations from a macro) as not |
668 | /// having side effects. |
669 | bool HasSideEffects(const ASTContext &Ctx, |
670 | bool IncludePossibleEffects = true) const; |
671 | |
672 | /// Determine whether this expression involves a call to any function |
673 | /// that is not trivial. |
674 | bool hasNonTrivialCall(const ASTContext &Ctx) const; |
675 | |
676 | /// EvaluateKnownConstInt - Call EvaluateAsRValue and return the folded |
677 | /// integer. This must be called on an expression that constant folds to an |
678 | /// integer. |
679 | llvm::APSInt EvaluateKnownConstInt( |
680 | const ASTContext &Ctx, |
681 | SmallVectorImpl<PartialDiagnosticAt> *Diag = nullptr) const; |
682 | |
683 | llvm::APSInt EvaluateKnownConstIntCheckOverflow( |
684 | const ASTContext &Ctx, |
685 | SmallVectorImpl<PartialDiagnosticAt> *Diag = nullptr) const; |
686 | |
687 | void EvaluateForOverflow(const ASTContext &Ctx) const; |
688 | |
689 | /// EvaluateAsLValue - Evaluate an expression to see if we can fold it to an |
690 | /// lvalue with link time known address, with no side-effects. |
691 | bool EvaluateAsLValue(EvalResult &Result, const ASTContext &Ctx, |
692 | bool InConstantContext = false) const; |
693 | |
694 | /// EvaluateAsInitializer - Evaluate an expression as if it were the |
695 | /// initializer of the given declaration. Returns true if the initializer |
696 | /// can be folded to a constant, and produces any relevant notes. In C++11, |
697 | /// notes will be produced if the expression is not a constant expression. |
698 | bool EvaluateAsInitializer(APValue &Result, const ASTContext &Ctx, |
699 | const VarDecl *VD, |
700 | SmallVectorImpl<PartialDiagnosticAt> &Notes, |
701 | bool IsConstantInitializer) const; |
702 | |
703 | /// EvaluateWithSubstitution - Evaluate an expression as if from the context |
704 | /// of a call to the given function with the given arguments, inside an |
705 | /// unevaluated context. Returns true if the expression could be folded to a |
706 | /// constant. |
707 | bool EvaluateWithSubstitution(APValue &Value, ASTContext &Ctx, |
708 | const FunctionDecl *Callee, |
709 | ArrayRef<const Expr*> Args, |
710 | const Expr *This = nullptr) const; |
711 | |
712 | enum class ConstantExprKind { |
713 | /// An integer constant expression (an array bound, enumerator, case value, |
714 | /// bit-field width, or similar) or similar. |
715 | Normal, |
716 | /// A non-class template argument. Such a value is only used for mangling, |
717 | /// not for code generation, so can refer to dllimported functions. |
718 | NonClassTemplateArgument, |
719 | /// A class template argument. Such a value is used for code generation. |
720 | ClassTemplateArgument, |
721 | /// An immediate invocation. The destruction of the end result of this |
722 | /// evaluation is not part of the evaluation, but all other temporaries |
723 | /// are destroyed. |
724 | ImmediateInvocation, |
725 | }; |
726 | |
727 | /// Evaluate an expression that is required to be a constant expression. Does |
728 | /// not check the syntactic constraints for C and C++98 constant expressions. |
729 | bool EvaluateAsConstantExpr( |
730 | EvalResult &Result, const ASTContext &Ctx, |
731 | ConstantExprKind Kind = ConstantExprKind::Normal) const; |
732 | |
733 | /// If the current Expr is a pointer, this will try to statically |
734 | /// determine the number of bytes available where the pointer is pointing. |
735 | /// Returns true if all of the above holds and we were able to figure out the |
736 | /// size, false otherwise. |
737 | /// |
738 | /// \param Type - How to evaluate the size of the Expr, as defined by the |
739 | /// "type" parameter of __builtin_object_size |
740 | bool tryEvaluateObjectSize(uint64_t &Result, ASTContext &Ctx, |
741 | unsigned Type) const; |
742 | |
743 | /// If the current Expr is a pointer, this will try to statically |
744 | /// determine the strlen of the string pointed to. |
745 | /// Returns true if all of the above holds and we were able to figure out the |
746 | /// strlen, false otherwise. |
747 | bool tryEvaluateStrLen(uint64_t &Result, ASTContext &Ctx) const; |
748 | |
749 | /// Enumeration used to describe the kind of Null pointer constant |
750 | /// returned from \c isNullPointerConstant(). |
751 | enum NullPointerConstantKind { |
752 | /// Expression is not a Null pointer constant. |
753 | NPCK_NotNull = 0, |
754 | |
755 | /// Expression is a Null pointer constant built from a zero integer |
756 | /// expression that is not a simple, possibly parenthesized, zero literal. |
757 | /// C++ Core Issue 903 will classify these expressions as "not pointers" |
758 | /// once it is adopted. |
759 | /// http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#903 |
760 | NPCK_ZeroExpression, |
761 | |
762 | /// Expression is a Null pointer constant built from a literal zero. |
763 | NPCK_ZeroLiteral, |
764 | |
765 | /// Expression is a C++11 nullptr. |
766 | NPCK_CXX11_nullptr, |
767 | |
768 | /// Expression is a GNU-style __null constant. |
769 | NPCK_GNUNull |
770 | }; |
771 | |
772 | /// Enumeration used to describe how \c isNullPointerConstant() |
773 | /// should cope with value-dependent expressions. |
774 | enum NullPointerConstantValueDependence { |
775 | /// Specifies that the expression should never be value-dependent. |
776 | NPC_NeverValueDependent = 0, |
777 | |
778 | /// Specifies that a value-dependent expression of integral or |
779 | /// dependent type should be considered a null pointer constant. |
780 | NPC_ValueDependentIsNull, |
781 | |
782 | /// Specifies that a value-dependent expression should be considered |
783 | /// to never be a null pointer constant. |
784 | NPC_ValueDependentIsNotNull |
785 | }; |
786 | |
787 | /// isNullPointerConstant - C99 6.3.2.3p3 - Test if this reduces down to |
788 | /// a Null pointer constant. The return value can further distinguish the |
789 | /// kind of NULL pointer constant that was detected. |
790 | NullPointerConstantKind isNullPointerConstant( |
791 | ASTContext &Ctx, |
792 | NullPointerConstantValueDependence NPC) const; |
793 | |
794 | /// isOBJCGCCandidate - Return true if this expression may be used in a read/ |
795 | /// write barrier. |
796 | bool isOBJCGCCandidate(ASTContext &Ctx) const; |
797 | |
798 | /// Returns true if this expression is a bound member function. |
799 | bool isBoundMemberFunction(ASTContext &Ctx) const; |
800 | |
801 | /// Given an expression of bound-member type, find the type |
802 | /// of the member. Returns null if this is an *overloaded* bound |
803 | /// member expression. |
804 | static QualType findBoundMemberType(const Expr *expr); |
805 | |
806 | /// Skip past any invisble AST nodes which might surround this |
807 | /// statement, such as ExprWithCleanups or ImplicitCastExpr nodes, |
808 | /// but also injected CXXMemberExpr and CXXConstructExpr which represent |
809 | /// implicit conversions. |
810 | Expr *IgnoreUnlessSpelledInSource(); |
811 | const Expr *IgnoreUnlessSpelledInSource() const { |
812 | return const_cast<Expr *>(this)->IgnoreUnlessSpelledInSource(); |
813 | } |
814 | |
815 | /// Skip past any implicit casts which might surround this expression until |
816 | /// reaching a fixed point. Skips: |
817 | /// * ImplicitCastExpr |
818 | /// * FullExpr |
819 | Expr *IgnoreImpCasts() LLVM_READONLY__attribute__((__pure__)); |
820 | const Expr *IgnoreImpCasts() const { |
821 | return const_cast<Expr *>(this)->IgnoreImpCasts(); |
822 | } |
823 | |
824 | /// Skip past any casts which might surround this expression until reaching |
825 | /// a fixed point. Skips: |
826 | /// * CastExpr |
827 | /// * FullExpr |
828 | /// * MaterializeTemporaryExpr |
829 | /// * SubstNonTypeTemplateParmExpr |
830 | Expr *IgnoreCasts() LLVM_READONLY__attribute__((__pure__)); |
831 | const Expr *IgnoreCasts() const { |
832 | return const_cast<Expr *>(this)->IgnoreCasts(); |
833 | } |
834 | |
835 | /// Skip past any implicit AST nodes which might surround this expression |
836 | /// until reaching a fixed point. Skips: |
837 | /// * What IgnoreImpCasts() skips |
838 | /// * MaterializeTemporaryExpr |
839 | /// * CXXBindTemporaryExpr |
840 | Expr *IgnoreImplicit() LLVM_READONLY__attribute__((__pure__)); |
841 | const Expr *IgnoreImplicit() const { |
842 | return const_cast<Expr *>(this)->IgnoreImplicit(); |
843 | } |
844 | |
845 | /// Skip past any implicit AST nodes which might surround this expression |
846 | /// until reaching a fixed point. Same as IgnoreImplicit, except that it |
847 | /// also skips over implicit calls to constructors and conversion functions. |
848 | /// |
849 | /// FIXME: Should IgnoreImplicit do this? |
850 | Expr *IgnoreImplicitAsWritten() LLVM_READONLY__attribute__((__pure__)); |
851 | const Expr *IgnoreImplicitAsWritten() const { |
852 | return const_cast<Expr *>(this)->IgnoreImplicitAsWritten(); |
853 | } |
854 | |
855 | /// Skip past any parentheses which might surround this expression until |
856 | /// reaching a fixed point. Skips: |
857 | /// * ParenExpr |
858 | /// * UnaryOperator if `UO_Extension` |
859 | /// * GenericSelectionExpr if `!isResultDependent()` |
860 | /// * ChooseExpr if `!isConditionDependent()` |
861 | /// * ConstantExpr |
862 | Expr *IgnoreParens() LLVM_READONLY__attribute__((__pure__)); |
863 | const Expr *IgnoreParens() const { |
864 | return const_cast<Expr *>(this)->IgnoreParens(); |
865 | } |
866 | |
867 | /// Skip past any parentheses and implicit casts which might surround this |
868 | /// expression until reaching a fixed point. |
869 | /// FIXME: IgnoreParenImpCasts really ought to be equivalent to |
870 | /// IgnoreParens() + IgnoreImpCasts() until reaching a fixed point. However |
871 | /// this is currently not the case. Instead IgnoreParenImpCasts() skips: |
872 | /// * What IgnoreParens() skips |
873 | /// * What IgnoreImpCasts() skips |
874 | /// * MaterializeTemporaryExpr |
875 | /// * SubstNonTypeTemplateParmExpr |
876 | Expr *IgnoreParenImpCasts() LLVM_READONLY__attribute__((__pure__)); |
877 | const Expr *IgnoreParenImpCasts() const { |
878 | return const_cast<Expr *>(this)->IgnoreParenImpCasts(); |
879 | } |
880 | |
881 | /// Skip past any parentheses and casts which might surround this expression |
882 | /// until reaching a fixed point. Skips: |
883 | /// * What IgnoreParens() skips |
884 | /// * What IgnoreCasts() skips |
885 | Expr *IgnoreParenCasts() LLVM_READONLY__attribute__((__pure__)); |
886 | const Expr *IgnoreParenCasts() const { |
887 | return const_cast<Expr *>(this)->IgnoreParenCasts(); |
888 | } |
889 | |
890 | /// Skip conversion operators. If this Expr is a call to a conversion |
891 | /// operator, return the argument. |
892 | Expr *IgnoreConversionOperatorSingleStep() LLVM_READONLY__attribute__((__pure__)); |
893 | const Expr *IgnoreConversionOperatorSingleStep() const { |
894 | return const_cast<Expr *>(this)->IgnoreConversionOperatorSingleStep(); |
895 | } |
896 | |
897 | /// Skip past any parentheses and lvalue casts which might surround this |
898 | /// expression until reaching a fixed point. Skips: |
899 | /// * What IgnoreParens() skips |
900 | /// * What IgnoreCasts() skips, except that only lvalue-to-rvalue |
901 | /// casts are skipped |
902 | /// FIXME: This is intended purely as a temporary workaround for code |
903 | /// that hasn't yet been rewritten to do the right thing about those |
904 | /// casts, and may disappear along with the last internal use. |
905 | Expr *IgnoreParenLValueCasts() LLVM_READONLY__attribute__((__pure__)); |
906 | const Expr *IgnoreParenLValueCasts() const { |
907 | return const_cast<Expr *>(this)->IgnoreParenLValueCasts(); |
908 | } |
909 | |
910 | /// Skip past any parenthese and casts which do not change the value |
911 | /// (including ptr->int casts of the same size) until reaching a fixed point. |
912 | /// Skips: |
913 | /// * What IgnoreParens() skips |
914 | /// * CastExpr which do not change the value |
915 | /// * SubstNonTypeTemplateParmExpr |
916 | Expr *IgnoreParenNoopCasts(const ASTContext &Ctx) LLVM_READONLY__attribute__((__pure__)); |
917 | const Expr *IgnoreParenNoopCasts(const ASTContext &Ctx) const { |
918 | return const_cast<Expr *>(this)->IgnoreParenNoopCasts(Ctx); |
919 | } |
920 | |
921 | /// Skip past any parentheses and derived-to-base casts until reaching a |
922 | /// fixed point. Skips: |
923 | /// * What IgnoreParens() skips |
924 | /// * CastExpr which represent a derived-to-base cast (CK_DerivedToBase, |
925 | /// CK_UncheckedDerivedToBase and CK_NoOp) |
926 | Expr *IgnoreParenBaseCasts() LLVM_READONLY__attribute__((__pure__)); |
927 | const Expr *IgnoreParenBaseCasts() const { |
928 | return const_cast<Expr *>(this)->IgnoreParenBaseCasts(); |
929 | } |
930 | |
931 | /// Determine whether this expression is a default function argument. |
932 | /// |
933 | /// Default arguments are implicitly generated in the abstract syntax tree |
934 | /// by semantic analysis for function calls, object constructions, etc. in |
935 | /// C++. Default arguments are represented by \c CXXDefaultArgExpr nodes; |
936 | /// this routine also looks through any implicit casts to determine whether |
937 | /// the expression is a default argument. |
938 | bool isDefaultArgument() const; |
939 | |
940 | /// Determine whether the result of this expression is a |
941 | /// temporary object of the given class type. |
942 | bool isTemporaryObject(ASTContext &Ctx, const CXXRecordDecl *TempTy) const; |
943 | |
944 | /// Whether this expression is an implicit reference to 'this' in C++. |
945 | bool isImplicitCXXThis() const; |
946 | |
947 | static bool hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs); |
948 | |
949 | /// For an expression of class type or pointer to class type, |
950 | /// return the most derived class decl the expression is known to refer to. |
951 | /// |
952 | /// If this expression is a cast, this method looks through it to find the |
953 | /// most derived decl that can be inferred from the expression. |
954 | /// This is valid because derived-to-base conversions have undefined |
955 | /// behavior if the object isn't dynamically of the derived type. |
956 | const CXXRecordDecl *getBestDynamicClassType() const; |
957 | |
958 | /// Get the inner expression that determines the best dynamic class. |
959 | /// If this is a prvalue, we guarantee that it is of the most-derived type |
960 | /// for the object itself. |
961 | const Expr *getBestDynamicClassTypeExpr() const; |
962 | |
963 | /// Walk outwards from an expression we want to bind a reference to and |
964 | /// find the expression whose lifetime needs to be extended. Record |
965 | /// the LHSs of comma expressions and adjustments needed along the path. |
966 | const Expr *skipRValueSubobjectAdjustments( |
967 | SmallVectorImpl<const Expr *> &CommaLHS, |
968 | SmallVectorImpl<SubobjectAdjustment> &Adjustments) const; |
969 | const Expr *skipRValueSubobjectAdjustments() const { |
970 | SmallVector<const Expr *, 8> CommaLHSs; |
971 | SmallVector<SubobjectAdjustment, 8> Adjustments; |
972 | return skipRValueSubobjectAdjustments(CommaLHSs, Adjustments); |
973 | } |
974 | |
975 | /// Checks that the two Expr's will refer to the same value as a comparison |
976 | /// operand. The caller must ensure that the values referenced by the Expr's |
977 | /// are not modified between E1 and E2 or the result my be invalid. |
978 | static bool isSameComparisonOperand(const Expr* E1, const Expr* E2); |
979 | |
980 | static bool classof(const Stmt *T) { |
981 | return T->getStmtClass() >= firstExprConstant && |
982 | T->getStmtClass() <= lastExprConstant; |
983 | } |
984 | }; |
985 | // PointerLikeTypeTraits is specialized so it can be used with a forward-decl of |
986 | // Expr. Verify that we got it right. |
987 | static_assert(llvm::PointerLikeTypeTraits<Expr *>::NumLowBitsAvailable <= |
988 | llvm::detail::ConstantLog2<alignof(Expr)>::value, |
989 | "PointerLikeTypeTraits<Expr*> assumes too much alignment."); |
990 | |
991 | using ConstantExprKind = Expr::ConstantExprKind; |
992 | |
993 | //===----------------------------------------------------------------------===// |
994 | // Wrapper Expressions. |
995 | //===----------------------------------------------------------------------===// |
996 | |
997 | /// FullExpr - Represents a "full-expression" node. |
998 | class FullExpr : public Expr { |
999 | protected: |
1000 | Stmt *SubExpr; |
1001 | |
1002 | FullExpr(StmtClass SC, Expr *subexpr) |
1003 | : Expr(SC, subexpr->getType(), subexpr->getValueKind(), |
1004 | subexpr->getObjectKind()), |
1005 | SubExpr(subexpr) { |
1006 | setDependence(computeDependence(this)); |
1007 | } |
1008 | FullExpr(StmtClass SC, EmptyShell Empty) |
1009 | : Expr(SC, Empty) {} |
1010 | public: |
1011 | const Expr *getSubExpr() const { return cast<Expr>(SubExpr); } |
1012 | Expr *getSubExpr() { return cast<Expr>(SubExpr); } |
1013 | |
1014 | /// As with any mutator of the AST, be very careful when modifying an |
1015 | /// existing AST to preserve its invariants. |
1016 | void setSubExpr(Expr *E) { SubExpr = E; } |
1017 | |
1018 | static bool classof(const Stmt *T) { |
1019 | return T->getStmtClass() >= firstFullExprConstant && |
1020 | T->getStmtClass() <= lastFullExprConstant; |
1021 | } |
1022 | }; |
1023 | |
1024 | /// ConstantExpr - An expression that occurs in a constant context and |
1025 | /// optionally the result of evaluating the expression. |
1026 | class ConstantExpr final |
1027 | : public FullExpr, |
1028 | private llvm::TrailingObjects<ConstantExpr, APValue, uint64_t> { |
1029 | static_assert(std::is_same<uint64_t, llvm::APInt::WordType>::value, |
1030 | "ConstantExpr assumes that llvm::APInt::WordType is uint64_t " |
1031 | "for tail-allocated storage"); |
1032 | friend TrailingObjects; |
1033 | friend class ASTStmtReader; |
1034 | friend class ASTStmtWriter; |
1035 | |
1036 | public: |
1037 | /// Describes the kind of result that can be tail-allocated. |
1038 | enum ResultStorageKind { RSK_None, RSK_Int64, RSK_APValue }; |
1039 | |
1040 | private: |
1041 | size_t numTrailingObjects(OverloadToken<APValue>) const { |
1042 | return ConstantExprBits.ResultKind == ConstantExpr::RSK_APValue; |
1043 | } |
1044 | size_t numTrailingObjects(OverloadToken<uint64_t>) const { |
1045 | return ConstantExprBits.ResultKind == ConstantExpr::RSK_Int64; |
1046 | } |
1047 | |
1048 | uint64_t &Int64Result() { |
1049 | assert(ConstantExprBits.ResultKind == ConstantExpr::RSK_Int64 &&(static_cast <bool> (ConstantExprBits.ResultKind == ConstantExpr ::RSK_Int64 && "invalid accessor") ? void (0) : __assert_fail ("ConstantExprBits.ResultKind == ConstantExpr::RSK_Int64 && \"invalid accessor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1050, __extension__ __PRETTY_FUNCTION__)) |
1050 | "invalid accessor")(static_cast <bool> (ConstantExprBits.ResultKind == ConstantExpr ::RSK_Int64 && "invalid accessor") ? void (0) : __assert_fail ("ConstantExprBits.ResultKind == ConstantExpr::RSK_Int64 && \"invalid accessor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1050, __extension__ __PRETTY_FUNCTION__)); |
1051 | return *getTrailingObjects<uint64_t>(); |
1052 | } |
1053 | const uint64_t &Int64Result() const { |
1054 | return const_cast<ConstantExpr *>(this)->Int64Result(); |
1055 | } |
1056 | APValue &APValueResult() { |
1057 | assert(ConstantExprBits.ResultKind == ConstantExpr::RSK_APValue &&(static_cast <bool> (ConstantExprBits.ResultKind == ConstantExpr ::RSK_APValue && "invalid accessor") ? void (0) : __assert_fail ("ConstantExprBits.ResultKind == ConstantExpr::RSK_APValue && \"invalid accessor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1058, __extension__ __PRETTY_FUNCTION__)) |
1058 | "invalid accessor")(static_cast <bool> (ConstantExprBits.ResultKind == ConstantExpr ::RSK_APValue && "invalid accessor") ? void (0) : __assert_fail ("ConstantExprBits.ResultKind == ConstantExpr::RSK_APValue && \"invalid accessor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1058, __extension__ __PRETTY_FUNCTION__)); |
1059 | return *getTrailingObjects<APValue>(); |
1060 | } |
1061 | APValue &APValueResult() const { |
1062 | return const_cast<ConstantExpr *>(this)->APValueResult(); |
1063 | } |
1064 | |
1065 | ConstantExpr(Expr *SubExpr, ResultStorageKind StorageKind, |
1066 | bool IsImmediateInvocation); |
1067 | ConstantExpr(EmptyShell Empty, ResultStorageKind StorageKind); |
1068 | |
1069 | public: |
1070 | static ConstantExpr *Create(const ASTContext &Context, Expr *E, |
1071 | const APValue &Result); |
1072 | static ConstantExpr *Create(const ASTContext &Context, Expr *E, |
1073 | ResultStorageKind Storage = RSK_None, |
1074 | bool IsImmediateInvocation = false); |
1075 | static ConstantExpr *CreateEmpty(const ASTContext &Context, |
1076 | ResultStorageKind StorageKind); |
1077 | |
1078 | static ResultStorageKind getStorageKind(const APValue &Value); |
1079 | static ResultStorageKind getStorageKind(const Type *T, |
1080 | const ASTContext &Context); |
1081 | |
1082 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
1083 | return SubExpr->getBeginLoc(); |
1084 | } |
1085 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
1086 | return SubExpr->getEndLoc(); |
1087 | } |
1088 | |
1089 | static bool classof(const Stmt *T) { |
1090 | return T->getStmtClass() == ConstantExprClass; |
1091 | } |
1092 | |
1093 | void SetResult(APValue Value, const ASTContext &Context) { |
1094 | MoveIntoResult(Value, Context); |
1095 | } |
1096 | void MoveIntoResult(APValue &Value, const ASTContext &Context); |
1097 | |
1098 | APValue::ValueKind getResultAPValueKind() const { |
1099 | return static_cast<APValue::ValueKind>(ConstantExprBits.APValueKind); |
1100 | } |
1101 | ResultStorageKind getResultStorageKind() const { |
1102 | return static_cast<ResultStorageKind>(ConstantExprBits.ResultKind); |
1103 | } |
1104 | bool isImmediateInvocation() const { |
1105 | return ConstantExprBits.IsImmediateInvocation; |
1106 | } |
1107 | bool hasAPValueResult() const { |
1108 | return ConstantExprBits.APValueKind != APValue::None; |
1109 | } |
1110 | APValue getAPValueResult() const; |
1111 | APValue &getResultAsAPValue() const { return APValueResult(); } |
1112 | llvm::APSInt getResultAsAPSInt() const; |
1113 | // Iterators |
1114 | child_range children() { return child_range(&SubExpr, &SubExpr+1); } |
1115 | const_child_range children() const { |
1116 | return const_child_range(&SubExpr, &SubExpr + 1); |
1117 | } |
1118 | }; |
1119 | |
1120 | //===----------------------------------------------------------------------===// |
1121 | // Primary Expressions. |
1122 | //===----------------------------------------------------------------------===// |
1123 | |
1124 | /// OpaqueValueExpr - An expression referring to an opaque object of a |
1125 | /// fixed type and value class. These don't correspond to concrete |
1126 | /// syntax; instead they're used to express operations (usually copy |
1127 | /// operations) on values whose source is generally obvious from |
1128 | /// context. |
1129 | class OpaqueValueExpr : public Expr { |
1130 | friend class ASTStmtReader; |
1131 | Expr *SourceExpr; |
1132 | |
1133 | public: |
1134 | OpaqueValueExpr(SourceLocation Loc, QualType T, ExprValueKind VK, |
1135 | ExprObjectKind OK = OK_Ordinary, Expr *SourceExpr = nullptr) |
1136 | : Expr(OpaqueValueExprClass, T, VK, OK), SourceExpr(SourceExpr) { |
1137 | setIsUnique(false); |
1138 | OpaqueValueExprBits.Loc = Loc; |
1139 | setDependence(computeDependence(this)); |
1140 | } |
1141 | |
1142 | /// Given an expression which invokes a copy constructor --- i.e. a |
1143 | /// CXXConstructExpr, possibly wrapped in an ExprWithCleanups --- |
1144 | /// find the OpaqueValueExpr that's the source of the construction. |
1145 | static const OpaqueValueExpr *findInCopyConstruct(const Expr *expr); |
1146 | |
1147 | explicit OpaqueValueExpr(EmptyShell Empty) |
1148 | : Expr(OpaqueValueExprClass, Empty) {} |
1149 | |
1150 | /// Retrieve the location of this expression. |
1151 | SourceLocation getLocation() const { return OpaqueValueExprBits.Loc; } |
1152 | |
1153 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
1154 | return SourceExpr ? SourceExpr->getBeginLoc() : getLocation(); |
1155 | } |
1156 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
1157 | return SourceExpr ? SourceExpr->getEndLoc() : getLocation(); |
1158 | } |
1159 | SourceLocation getExprLoc() const LLVM_READONLY__attribute__((__pure__)) { |
1160 | return SourceExpr ? SourceExpr->getExprLoc() : getLocation(); |
1161 | } |
1162 | |
1163 | child_range children() { |
1164 | return child_range(child_iterator(), child_iterator()); |
1165 | } |
1166 | |
1167 | const_child_range children() const { |
1168 | return const_child_range(const_child_iterator(), const_child_iterator()); |
1169 | } |
1170 | |
1171 | /// The source expression of an opaque value expression is the |
1172 | /// expression which originally generated the value. This is |
1173 | /// provided as a convenience for analyses that don't wish to |
1174 | /// precisely model the execution behavior of the program. |
1175 | /// |
1176 | /// The source expression is typically set when building the |
1177 | /// expression which binds the opaque value expression in the first |
1178 | /// place. |
1179 | Expr *getSourceExpr() const { return SourceExpr; } |
1180 | |
1181 | void setIsUnique(bool V) { |
1182 | assert((!V || SourceExpr) &&(static_cast <bool> ((!V || SourceExpr) && "unique OVEs are expected to have source expressions" ) ? void (0) : __assert_fail ("(!V || SourceExpr) && \"unique OVEs are expected to have source expressions\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1183, __extension__ __PRETTY_FUNCTION__)) |
1183 | "unique OVEs are expected to have source expressions")(static_cast <bool> ((!V || SourceExpr) && "unique OVEs are expected to have source expressions" ) ? void (0) : __assert_fail ("(!V || SourceExpr) && \"unique OVEs are expected to have source expressions\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1183, __extension__ __PRETTY_FUNCTION__)); |
1184 | OpaqueValueExprBits.IsUnique = V; |
1185 | } |
1186 | |
1187 | bool isUnique() const { return OpaqueValueExprBits.IsUnique; } |
1188 | |
1189 | static bool classof(const Stmt *T) { |
1190 | return T->getStmtClass() == OpaqueValueExprClass; |
1191 | } |
1192 | }; |
1193 | |
1194 | /// A reference to a declared variable, function, enum, etc. |
1195 | /// [C99 6.5.1p2] |
1196 | /// |
1197 | /// This encodes all the information about how a declaration is referenced |
1198 | /// within an expression. |
1199 | /// |
1200 | /// There are several optional constructs attached to DeclRefExprs only when |
1201 | /// they apply in order to conserve memory. These are laid out past the end of |
1202 | /// the object, and flags in the DeclRefExprBitfield track whether they exist: |
1203 | /// |
1204 | /// DeclRefExprBits.HasQualifier: |
1205 | /// Specifies when this declaration reference expression has a C++ |
1206 | /// nested-name-specifier. |
1207 | /// DeclRefExprBits.HasFoundDecl: |
1208 | /// Specifies when this declaration reference expression has a record of |
1209 | /// a NamedDecl (different from the referenced ValueDecl) which was found |
1210 | /// during name lookup and/or overload resolution. |
1211 | /// DeclRefExprBits.HasTemplateKWAndArgsInfo: |
1212 | /// Specifies when this declaration reference expression has an explicit |
1213 | /// C++ template keyword and/or template argument list. |
1214 | /// DeclRefExprBits.RefersToEnclosingVariableOrCapture |
1215 | /// Specifies when this declaration reference expression (validly) |
1216 | /// refers to an enclosed local or a captured variable. |
1217 | class DeclRefExpr final |
1218 | : public Expr, |
1219 | private llvm::TrailingObjects<DeclRefExpr, NestedNameSpecifierLoc, |
1220 | NamedDecl *, ASTTemplateKWAndArgsInfo, |
1221 | TemplateArgumentLoc> { |
1222 | friend class ASTStmtReader; |
1223 | friend class ASTStmtWriter; |
1224 | friend TrailingObjects; |
1225 | |
1226 | /// The declaration that we are referencing. |
1227 | ValueDecl *D; |
1228 | |
1229 | /// Provides source/type location info for the declaration name |
1230 | /// embedded in D. |
1231 | DeclarationNameLoc DNLoc; |
1232 | |
1233 | size_t numTrailingObjects(OverloadToken<NestedNameSpecifierLoc>) const { |
1234 | return hasQualifier(); |
1235 | } |
1236 | |
1237 | size_t numTrailingObjects(OverloadToken<NamedDecl *>) const { |
1238 | return hasFoundDecl(); |
1239 | } |
1240 | |
1241 | size_t numTrailingObjects(OverloadToken<ASTTemplateKWAndArgsInfo>) const { |
1242 | return hasTemplateKWAndArgsInfo(); |
1243 | } |
1244 | |
1245 | /// Test whether there is a distinct FoundDecl attached to the end of |
1246 | /// this DRE. |
1247 | bool hasFoundDecl() const { return DeclRefExprBits.HasFoundDecl; } |
1248 | |
1249 | DeclRefExpr(const ASTContext &Ctx, NestedNameSpecifierLoc QualifierLoc, |
1250 | SourceLocation TemplateKWLoc, ValueDecl *D, |
1251 | bool RefersToEnlosingVariableOrCapture, |
1252 | const DeclarationNameInfo &NameInfo, NamedDecl *FoundD, |
1253 | const TemplateArgumentListInfo *TemplateArgs, QualType T, |
1254 | ExprValueKind VK, NonOdrUseReason NOUR); |
1255 | |
1256 | /// Construct an empty declaration reference expression. |
1257 | explicit DeclRefExpr(EmptyShell Empty) : Expr(DeclRefExprClass, Empty) {} |
1258 | |
1259 | public: |
1260 | DeclRefExpr(const ASTContext &Ctx, ValueDecl *D, |
1261 | bool RefersToEnclosingVariableOrCapture, QualType T, |
1262 | ExprValueKind VK, SourceLocation L, |
1263 | const DeclarationNameLoc &LocInfo = DeclarationNameLoc(), |
1264 | NonOdrUseReason NOUR = NOUR_None); |
1265 | |
1266 | static DeclRefExpr * |
1267 | Create(const ASTContext &Context, NestedNameSpecifierLoc QualifierLoc, |
1268 | SourceLocation TemplateKWLoc, ValueDecl *D, |
1269 | bool RefersToEnclosingVariableOrCapture, SourceLocation NameLoc, |
1270 | QualType T, ExprValueKind VK, NamedDecl *FoundD = nullptr, |
1271 | const TemplateArgumentListInfo *TemplateArgs = nullptr, |
1272 | NonOdrUseReason NOUR = NOUR_None); |
1273 | |
1274 | static DeclRefExpr * |
1275 | Create(const ASTContext &Context, NestedNameSpecifierLoc QualifierLoc, |
1276 | SourceLocation TemplateKWLoc, ValueDecl *D, |
1277 | bool RefersToEnclosingVariableOrCapture, |
1278 | const DeclarationNameInfo &NameInfo, QualType T, ExprValueKind VK, |
1279 | NamedDecl *FoundD = nullptr, |
1280 | const TemplateArgumentListInfo *TemplateArgs = nullptr, |
1281 | NonOdrUseReason NOUR = NOUR_None); |
1282 | |
1283 | /// Construct an empty declaration reference expression. |
1284 | static DeclRefExpr *CreateEmpty(const ASTContext &Context, bool HasQualifier, |
1285 | bool HasFoundDecl, |
1286 | bool HasTemplateKWAndArgsInfo, |
1287 | unsigned NumTemplateArgs); |
1288 | |
1289 | ValueDecl *getDecl() { return D; } |
1290 | const ValueDecl *getDecl() const { return D; } |
1291 | void setDecl(ValueDecl *NewD); |
1292 | |
1293 | DeclarationNameInfo getNameInfo() const { |
1294 | return DeclarationNameInfo(getDecl()->getDeclName(), getLocation(), DNLoc); |
1295 | } |
1296 | |
1297 | SourceLocation getLocation() const { return DeclRefExprBits.Loc; } |
1298 | void setLocation(SourceLocation L) { DeclRefExprBits.Loc = L; } |
1299 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)); |
1300 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)); |
1301 | |
1302 | /// Determine whether this declaration reference was preceded by a |
1303 | /// C++ nested-name-specifier, e.g., \c N::foo. |
1304 | bool hasQualifier() const { return DeclRefExprBits.HasQualifier; } |
1305 | |
1306 | /// If the name was qualified, retrieves the nested-name-specifier |
1307 | /// that precedes the name, with source-location information. |
1308 | NestedNameSpecifierLoc getQualifierLoc() const { |
1309 | if (!hasQualifier()) |
1310 | return NestedNameSpecifierLoc(); |
1311 | return *getTrailingObjects<NestedNameSpecifierLoc>(); |
1312 | } |
1313 | |
1314 | /// If the name was qualified, retrieves the nested-name-specifier |
1315 | /// that precedes the name. Otherwise, returns NULL. |
1316 | NestedNameSpecifier *getQualifier() const { |
1317 | return getQualifierLoc().getNestedNameSpecifier(); |
1318 | } |
1319 | |
1320 | /// Get the NamedDecl through which this reference occurred. |
1321 | /// |
1322 | /// This Decl may be different from the ValueDecl actually referred to in the |
1323 | /// presence of using declarations, etc. It always returns non-NULL, and may |
1324 | /// simple return the ValueDecl when appropriate. |
1325 | |
1326 | NamedDecl *getFoundDecl() { |
1327 | return hasFoundDecl() ? *getTrailingObjects<NamedDecl *>() : D; |
1328 | } |
1329 | |
1330 | /// Get the NamedDecl through which this reference occurred. |
1331 | /// See non-const variant. |
1332 | const NamedDecl *getFoundDecl() const { |
1333 | return hasFoundDecl() ? *getTrailingObjects<NamedDecl *>() : D; |
1334 | } |
1335 | |
1336 | bool hasTemplateKWAndArgsInfo() const { |
1337 | return DeclRefExprBits.HasTemplateKWAndArgsInfo; |
1338 | } |
1339 | |
1340 | /// Retrieve the location of the template keyword preceding |
1341 | /// this name, if any. |
1342 | SourceLocation getTemplateKeywordLoc() const { |
1343 | if (!hasTemplateKWAndArgsInfo()) |
1344 | return SourceLocation(); |
1345 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->TemplateKWLoc; |
1346 | } |
1347 | |
1348 | /// Retrieve the location of the left angle bracket starting the |
1349 | /// explicit template argument list following the name, if any. |
1350 | SourceLocation getLAngleLoc() const { |
1351 | if (!hasTemplateKWAndArgsInfo()) |
1352 | return SourceLocation(); |
1353 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->LAngleLoc; |
1354 | } |
1355 | |
1356 | /// Retrieve the location of the right angle bracket ending the |
1357 | /// explicit template argument list following the name, if any. |
1358 | SourceLocation getRAngleLoc() const { |
1359 | if (!hasTemplateKWAndArgsInfo()) |
1360 | return SourceLocation(); |
1361 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->RAngleLoc; |
1362 | } |
1363 | |
1364 | /// Determines whether the name in this declaration reference |
1365 | /// was preceded by the template keyword. |
1366 | bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } |
1367 | |
1368 | /// Determines whether this declaration reference was followed by an |
1369 | /// explicit template argument list. |
1370 | bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } |
1371 | |
1372 | /// Copies the template arguments (if present) into the given |
1373 | /// structure. |
1374 | void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { |
1375 | if (hasExplicitTemplateArgs()) |
1376 | getTrailingObjects<ASTTemplateKWAndArgsInfo>()->copyInto( |
1377 | getTrailingObjects<TemplateArgumentLoc>(), List); |
1378 | } |
1379 | |
1380 | /// Retrieve the template arguments provided as part of this |
1381 | /// template-id. |
1382 | const TemplateArgumentLoc *getTemplateArgs() const { |
1383 | if (!hasExplicitTemplateArgs()) |
1384 | return nullptr; |
1385 | return getTrailingObjects<TemplateArgumentLoc>(); |
1386 | } |
1387 | |
1388 | /// Retrieve the number of template arguments provided as part of this |
1389 | /// template-id. |
1390 | unsigned getNumTemplateArgs() const { |
1391 | if (!hasExplicitTemplateArgs()) |
1392 | return 0; |
1393 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->NumTemplateArgs; |
1394 | } |
1395 | |
1396 | ArrayRef<TemplateArgumentLoc> template_arguments() const { |
1397 | return {getTemplateArgs(), getNumTemplateArgs()}; |
1398 | } |
1399 | |
1400 | /// Returns true if this expression refers to a function that |
1401 | /// was resolved from an overloaded set having size greater than 1. |
1402 | bool hadMultipleCandidates() const { |
1403 | return DeclRefExprBits.HadMultipleCandidates; |
1404 | } |
1405 | /// Sets the flag telling whether this expression refers to |
1406 | /// a function that was resolved from an overloaded set having size |
1407 | /// greater than 1. |
1408 | void setHadMultipleCandidates(bool V = true) { |
1409 | DeclRefExprBits.HadMultipleCandidates = V; |
1410 | } |
1411 | |
1412 | /// Is this expression a non-odr-use reference, and if so, why? |
1413 | NonOdrUseReason isNonOdrUse() const { |
1414 | return static_cast<NonOdrUseReason>(DeclRefExprBits.NonOdrUseReason); |
1415 | } |
1416 | |
1417 | /// Does this DeclRefExpr refer to an enclosing local or a captured |
1418 | /// variable? |
1419 | bool refersToEnclosingVariableOrCapture() const { |
1420 | return DeclRefExprBits.RefersToEnclosingVariableOrCapture; |
1421 | } |
1422 | |
1423 | static bool classof(const Stmt *T) { |
1424 | return T->getStmtClass() == DeclRefExprClass; |
1425 | } |
1426 | |
1427 | // Iterators |
1428 | child_range children() { |
1429 | return child_range(child_iterator(), child_iterator()); |
1430 | } |
1431 | |
1432 | const_child_range children() const { |
1433 | return const_child_range(const_child_iterator(), const_child_iterator()); |
1434 | } |
1435 | }; |
1436 | |
1437 | /// Used by IntegerLiteral/FloatingLiteral to store the numeric without |
1438 | /// leaking memory. |
1439 | /// |
1440 | /// For large floats/integers, APFloat/APInt will allocate memory from the heap |
1441 | /// to represent these numbers. Unfortunately, when we use a BumpPtrAllocator |
1442 | /// to allocate IntegerLiteral/FloatingLiteral nodes the memory associated with |
1443 | /// the APFloat/APInt values will never get freed. APNumericStorage uses |
1444 | /// ASTContext's allocator for memory allocation. |
1445 | class APNumericStorage { |
1446 | union { |
1447 | uint64_t VAL; ///< Used to store the <= 64 bits integer value. |
1448 | uint64_t *pVal; ///< Used to store the >64 bits integer value. |
1449 | }; |
1450 | unsigned BitWidth; |
1451 | |
1452 | bool hasAllocation() const { return llvm::APInt::getNumWords(BitWidth) > 1; } |
1453 | |
1454 | APNumericStorage(const APNumericStorage &) = delete; |
1455 | void operator=(const APNumericStorage &) = delete; |
1456 | |
1457 | protected: |
1458 | APNumericStorage() : VAL(0), BitWidth(0) { } |
1459 | |
1460 | llvm::APInt getIntValue() const { |
1461 | unsigned NumWords = llvm::APInt::getNumWords(BitWidth); |
1462 | if (NumWords > 1) |
1463 | return llvm::APInt(BitWidth, NumWords, pVal); |
1464 | else |
1465 | return llvm::APInt(BitWidth, VAL); |
1466 | } |
1467 | void setIntValue(const ASTContext &C, const llvm::APInt &Val); |
1468 | }; |
1469 | |
1470 | class APIntStorage : private APNumericStorage { |
1471 | public: |
1472 | llvm::APInt getValue() const { return getIntValue(); } |
1473 | void setValue(const ASTContext &C, const llvm::APInt &Val) { |
1474 | setIntValue(C, Val); |
1475 | } |
1476 | }; |
1477 | |
1478 | class APFloatStorage : private APNumericStorage { |
1479 | public: |
1480 | llvm::APFloat getValue(const llvm::fltSemantics &Semantics) const { |
1481 | return llvm::APFloat(Semantics, getIntValue()); |
1482 | } |
1483 | void setValue(const ASTContext &C, const llvm::APFloat &Val) { |
1484 | setIntValue(C, Val.bitcastToAPInt()); |
1485 | } |
1486 | }; |
1487 | |
1488 | class IntegerLiteral : public Expr, public APIntStorage { |
1489 | SourceLocation Loc; |
1490 | |
1491 | /// Construct an empty integer literal. |
1492 | explicit IntegerLiteral(EmptyShell Empty) |
1493 | : Expr(IntegerLiteralClass, Empty) { } |
1494 | |
1495 | public: |
1496 | // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, |
1497 | // or UnsignedLongLongTy |
1498 | IntegerLiteral(const ASTContext &C, const llvm::APInt &V, QualType type, |
1499 | SourceLocation l); |
1500 | |
1501 | /// Returns a new integer literal with value 'V' and type 'type'. |
1502 | /// \param type - either IntTy, LongTy, LongLongTy, UnsignedIntTy, |
1503 | /// UnsignedLongTy, or UnsignedLongLongTy which should match the size of V |
1504 | /// \param V - the value that the returned integer literal contains. |
1505 | static IntegerLiteral *Create(const ASTContext &C, const llvm::APInt &V, |
1506 | QualType type, SourceLocation l); |
1507 | /// Returns a new empty integer literal. |
1508 | static IntegerLiteral *Create(const ASTContext &C, EmptyShell Empty); |
1509 | |
1510 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1511 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1512 | |
1513 | /// Retrieve the location of the literal. |
1514 | SourceLocation getLocation() const { return Loc; } |
1515 | |
1516 | void setLocation(SourceLocation Location) { Loc = Location; } |
1517 | |
1518 | static bool classof(const Stmt *T) { |
1519 | return T->getStmtClass() == IntegerLiteralClass; |
1520 | } |
1521 | |
1522 | // Iterators |
1523 | child_range children() { |
1524 | return child_range(child_iterator(), child_iterator()); |
1525 | } |
1526 | const_child_range children() const { |
1527 | return const_child_range(const_child_iterator(), const_child_iterator()); |
1528 | } |
1529 | }; |
1530 | |
1531 | class FixedPointLiteral : public Expr, public APIntStorage { |
1532 | SourceLocation Loc; |
1533 | unsigned Scale; |
1534 | |
1535 | /// \brief Construct an empty fixed-point literal. |
1536 | explicit FixedPointLiteral(EmptyShell Empty) |
1537 | : Expr(FixedPointLiteralClass, Empty) {} |
1538 | |
1539 | public: |
1540 | FixedPointLiteral(const ASTContext &C, const llvm::APInt &V, QualType type, |
1541 | SourceLocation l, unsigned Scale); |
1542 | |
1543 | // Store the int as is without any bit shifting. |
1544 | static FixedPointLiteral *CreateFromRawInt(const ASTContext &C, |
1545 | const llvm::APInt &V, |
1546 | QualType type, SourceLocation l, |
1547 | unsigned Scale); |
1548 | |
1549 | /// Returns an empty fixed-point literal. |
1550 | static FixedPointLiteral *Create(const ASTContext &C, EmptyShell Empty); |
1551 | |
1552 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1553 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1554 | |
1555 | /// \brief Retrieve the location of the literal. |
1556 | SourceLocation getLocation() const { return Loc; } |
1557 | |
1558 | void setLocation(SourceLocation Location) { Loc = Location; } |
1559 | |
1560 | unsigned getScale() const { return Scale; } |
1561 | void setScale(unsigned S) { Scale = S; } |
1562 | |
1563 | static bool classof(const Stmt *T) { |
1564 | return T->getStmtClass() == FixedPointLiteralClass; |
1565 | } |
1566 | |
1567 | std::string getValueAsString(unsigned Radix) const; |
1568 | |
1569 | // Iterators |
1570 | child_range children() { |
1571 | return child_range(child_iterator(), child_iterator()); |
1572 | } |
1573 | const_child_range children() const { |
1574 | return const_child_range(const_child_iterator(), const_child_iterator()); |
1575 | } |
1576 | }; |
1577 | |
1578 | class CharacterLiteral : public Expr { |
1579 | public: |
1580 | enum CharacterKind { |
1581 | Ascii, |
1582 | Wide, |
1583 | UTF8, |
1584 | UTF16, |
1585 | UTF32 |
1586 | }; |
1587 | |
1588 | private: |
1589 | unsigned Value; |
1590 | SourceLocation Loc; |
1591 | public: |
1592 | // type should be IntTy |
1593 | CharacterLiteral(unsigned value, CharacterKind kind, QualType type, |
1594 | SourceLocation l) |
1595 | : Expr(CharacterLiteralClass, type, VK_PRValue, OK_Ordinary), |
1596 | Value(value), Loc(l) { |
1597 | CharacterLiteralBits.Kind = kind; |
1598 | setDependence(ExprDependence::None); |
1599 | } |
1600 | |
1601 | /// Construct an empty character literal. |
1602 | CharacterLiteral(EmptyShell Empty) : Expr(CharacterLiteralClass, Empty) { } |
1603 | |
1604 | SourceLocation getLocation() const { return Loc; } |
1605 | CharacterKind getKind() const { |
1606 | return static_cast<CharacterKind>(CharacterLiteralBits.Kind); |
1607 | } |
1608 | |
1609 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1610 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1611 | |
1612 | unsigned getValue() const { return Value; } |
1613 | |
1614 | void setLocation(SourceLocation Location) { Loc = Location; } |
1615 | void setKind(CharacterKind kind) { CharacterLiteralBits.Kind = kind; } |
1616 | void setValue(unsigned Val) { Value = Val; } |
1617 | |
1618 | static bool classof(const Stmt *T) { |
1619 | return T->getStmtClass() == CharacterLiteralClass; |
1620 | } |
1621 | |
1622 | static void print(unsigned val, CharacterKind Kind, raw_ostream &OS); |
1623 | |
1624 | // Iterators |
1625 | child_range children() { |
1626 | return child_range(child_iterator(), child_iterator()); |
1627 | } |
1628 | const_child_range children() const { |
1629 | return const_child_range(const_child_iterator(), const_child_iterator()); |
1630 | } |
1631 | }; |
1632 | |
1633 | class FloatingLiteral : public Expr, private APFloatStorage { |
1634 | SourceLocation Loc; |
1635 | |
1636 | FloatingLiteral(const ASTContext &C, const llvm::APFloat &V, bool isexact, |
1637 | QualType Type, SourceLocation L); |
1638 | |
1639 | /// Construct an empty floating-point literal. |
1640 | explicit FloatingLiteral(const ASTContext &C, EmptyShell Empty); |
1641 | |
1642 | public: |
1643 | static FloatingLiteral *Create(const ASTContext &C, const llvm::APFloat &V, |
1644 | bool isexact, QualType Type, SourceLocation L); |
1645 | static FloatingLiteral *Create(const ASTContext &C, EmptyShell Empty); |
1646 | |
1647 | llvm::APFloat getValue() const { |
1648 | return APFloatStorage::getValue(getSemantics()); |
1649 | } |
1650 | void setValue(const ASTContext &C, const llvm::APFloat &Val) { |
1651 | assert(&getSemantics() == &Val.getSemantics() && "Inconsistent semantics")(static_cast <bool> (&getSemantics() == &Val.getSemantics () && "Inconsistent semantics") ? void (0) : __assert_fail ("&getSemantics() == &Val.getSemantics() && \"Inconsistent semantics\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1651, __extension__ __PRETTY_FUNCTION__)); |
1652 | APFloatStorage::setValue(C, Val); |
1653 | } |
1654 | |
1655 | /// Get a raw enumeration value representing the floating-point semantics of |
1656 | /// this literal (32-bit IEEE, x87, ...), suitable for serialisation. |
1657 | llvm::APFloatBase::Semantics getRawSemantics() const { |
1658 | return static_cast<llvm::APFloatBase::Semantics>( |
1659 | FloatingLiteralBits.Semantics); |
1660 | } |
1661 | |
1662 | /// Set the raw enumeration value representing the floating-point semantics of |
1663 | /// this literal (32-bit IEEE, x87, ...), suitable for serialisation. |
1664 | void setRawSemantics(llvm::APFloatBase::Semantics Sem) { |
1665 | FloatingLiteralBits.Semantics = Sem; |
1666 | } |
1667 | |
1668 | /// Return the APFloat semantics this literal uses. |
1669 | const llvm::fltSemantics &getSemantics() const { |
1670 | return llvm::APFloatBase::EnumToSemantics( |
1671 | static_cast<llvm::APFloatBase::Semantics>( |
1672 | FloatingLiteralBits.Semantics)); |
1673 | } |
1674 | |
1675 | /// Set the APFloat semantics this literal uses. |
1676 | void setSemantics(const llvm::fltSemantics &Sem) { |
1677 | FloatingLiteralBits.Semantics = llvm::APFloatBase::SemanticsToEnum(Sem); |
1678 | } |
1679 | |
1680 | bool isExact() const { return FloatingLiteralBits.IsExact; } |
1681 | void setExact(bool E) { FloatingLiteralBits.IsExact = E; } |
1682 | |
1683 | /// getValueAsApproximateDouble - This returns the value as an inaccurate |
1684 | /// double. Note that this may cause loss of precision, but is useful for |
1685 | /// debugging dumps, etc. |
1686 | double getValueAsApproximateDouble() const; |
1687 | |
1688 | SourceLocation getLocation() const { return Loc; } |
1689 | void setLocation(SourceLocation L) { Loc = L; } |
1690 | |
1691 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1692 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Loc; } |
1693 | |
1694 | static bool classof(const Stmt *T) { |
1695 | return T->getStmtClass() == FloatingLiteralClass; |
1696 | } |
1697 | |
1698 | // Iterators |
1699 | child_range children() { |
1700 | return child_range(child_iterator(), child_iterator()); |
1701 | } |
1702 | const_child_range children() const { |
1703 | return const_child_range(const_child_iterator(), const_child_iterator()); |
1704 | } |
1705 | }; |
1706 | |
1707 | /// ImaginaryLiteral - We support imaginary integer and floating point literals, |
1708 | /// like "1.0i". We represent these as a wrapper around FloatingLiteral and |
1709 | /// IntegerLiteral classes. Instances of this class always have a Complex type |
1710 | /// whose element type matches the subexpression. |
1711 | /// |
1712 | class ImaginaryLiteral : public Expr { |
1713 | Stmt *Val; |
1714 | public: |
1715 | ImaginaryLiteral(Expr *val, QualType Ty) |
1716 | : Expr(ImaginaryLiteralClass, Ty, VK_PRValue, OK_Ordinary), Val(val) { |
1717 | setDependence(ExprDependence::None); |
1718 | } |
1719 | |
1720 | /// Build an empty imaginary literal. |
1721 | explicit ImaginaryLiteral(EmptyShell Empty) |
1722 | : Expr(ImaginaryLiteralClass, Empty) { } |
1723 | |
1724 | const Expr *getSubExpr() const { return cast<Expr>(Val); } |
1725 | Expr *getSubExpr() { return cast<Expr>(Val); } |
1726 | void setSubExpr(Expr *E) { Val = E; } |
1727 | |
1728 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
1729 | return Val->getBeginLoc(); |
1730 | } |
1731 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Val->getEndLoc(); } |
1732 | |
1733 | static bool classof(const Stmt *T) { |
1734 | return T->getStmtClass() == ImaginaryLiteralClass; |
1735 | } |
1736 | |
1737 | // Iterators |
1738 | child_range children() { return child_range(&Val, &Val+1); } |
1739 | const_child_range children() const { |
1740 | return const_child_range(&Val, &Val + 1); |
1741 | } |
1742 | }; |
1743 | |
1744 | /// StringLiteral - This represents a string literal expression, e.g. "foo" |
1745 | /// or L"bar" (wide strings). The actual string data can be obtained with |
1746 | /// getBytes() and is NOT null-terminated. The length of the string data is |
1747 | /// determined by calling getByteLength(). |
1748 | /// |
1749 | /// The C type for a string is always a ConstantArrayType. In C++, the char |
1750 | /// type is const qualified, in C it is not. |
1751 | /// |
1752 | /// Note that strings in C can be formed by concatenation of multiple string |
1753 | /// literal pptokens in translation phase #6. This keeps track of the locations |
1754 | /// of each of these pieces. |
1755 | /// |
1756 | /// Strings in C can also be truncated and extended by assigning into arrays, |
1757 | /// e.g. with constructs like: |
1758 | /// char X[2] = "foobar"; |
1759 | /// In this case, getByteLength() will return 6, but the string literal will |
1760 | /// have type "char[2]". |
1761 | class StringLiteral final |
1762 | : public Expr, |
1763 | private llvm::TrailingObjects<StringLiteral, unsigned, SourceLocation, |
1764 | char> { |
1765 | friend class ASTStmtReader; |
1766 | friend TrailingObjects; |
1767 | |
1768 | /// StringLiteral is followed by several trailing objects. They are in order: |
1769 | /// |
1770 | /// * A single unsigned storing the length in characters of this string. The |
1771 | /// length in bytes is this length times the width of a single character. |
1772 | /// Always present and stored as a trailing objects because storing it in |
1773 | /// StringLiteral would increase the size of StringLiteral by sizeof(void *) |
1774 | /// due to alignment requirements. If you add some data to StringLiteral, |
1775 | /// consider moving it inside StringLiteral. |
1776 | /// |
1777 | /// * An array of getNumConcatenated() SourceLocation, one for each of the |
1778 | /// token this string is made of. |
1779 | /// |
1780 | /// * An array of getByteLength() char used to store the string data. |
1781 | |
1782 | public: |
1783 | enum StringKind { Ascii, Wide, UTF8, UTF16, UTF32 }; |
1784 | |
1785 | private: |
1786 | unsigned numTrailingObjects(OverloadToken<unsigned>) const { return 1; } |
1787 | unsigned numTrailingObjects(OverloadToken<SourceLocation>) const { |
1788 | return getNumConcatenated(); |
1789 | } |
1790 | |
1791 | unsigned numTrailingObjects(OverloadToken<char>) const { |
1792 | return getByteLength(); |
1793 | } |
1794 | |
1795 | char *getStrDataAsChar() { return getTrailingObjects<char>(); } |
1796 | const char *getStrDataAsChar() const { return getTrailingObjects<char>(); } |
1797 | |
1798 | const uint16_t *getStrDataAsUInt16() const { |
1799 | return reinterpret_cast<const uint16_t *>(getTrailingObjects<char>()); |
1800 | } |
1801 | |
1802 | const uint32_t *getStrDataAsUInt32() const { |
1803 | return reinterpret_cast<const uint32_t *>(getTrailingObjects<char>()); |
1804 | } |
1805 | |
1806 | /// Build a string literal. |
1807 | StringLiteral(const ASTContext &Ctx, StringRef Str, StringKind Kind, |
1808 | bool Pascal, QualType Ty, const SourceLocation *Loc, |
1809 | unsigned NumConcatenated); |
1810 | |
1811 | /// Build an empty string literal. |
1812 | StringLiteral(EmptyShell Empty, unsigned NumConcatenated, unsigned Length, |
1813 | unsigned CharByteWidth); |
1814 | |
1815 | /// Map a target and string kind to the appropriate character width. |
1816 | static unsigned mapCharByteWidth(TargetInfo const &Target, StringKind SK); |
1817 | |
1818 | /// Set one of the string literal token. |
1819 | void setStrTokenLoc(unsigned TokNum, SourceLocation L) { |
1820 | assert(TokNum < getNumConcatenated() && "Invalid tok number")(static_cast <bool> (TokNum < getNumConcatenated() && "Invalid tok number") ? void (0) : __assert_fail ("TokNum < getNumConcatenated() && \"Invalid tok number\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1820, __extension__ __PRETTY_FUNCTION__)); |
1821 | getTrailingObjects<SourceLocation>()[TokNum] = L; |
1822 | } |
1823 | |
1824 | public: |
1825 | /// This is the "fully general" constructor that allows representation of |
1826 | /// strings formed from multiple concatenated tokens. |
1827 | static StringLiteral *Create(const ASTContext &Ctx, StringRef Str, |
1828 | StringKind Kind, bool Pascal, QualType Ty, |
1829 | const SourceLocation *Loc, |
1830 | unsigned NumConcatenated); |
1831 | |
1832 | /// Simple constructor for string literals made from one token. |
1833 | static StringLiteral *Create(const ASTContext &Ctx, StringRef Str, |
1834 | StringKind Kind, bool Pascal, QualType Ty, |
1835 | SourceLocation Loc) { |
1836 | return Create(Ctx, Str, Kind, Pascal, Ty, &Loc, 1); |
1837 | } |
1838 | |
1839 | /// Construct an empty string literal. |
1840 | static StringLiteral *CreateEmpty(const ASTContext &Ctx, |
1841 | unsigned NumConcatenated, unsigned Length, |
1842 | unsigned CharByteWidth); |
1843 | |
1844 | StringRef getString() const { |
1845 | assert(getCharByteWidth() == 1 &&(static_cast <bool> (getCharByteWidth() == 1 && "This function is used in places that assume strings use char" ) ? void (0) : __assert_fail ("getCharByteWidth() == 1 && \"This function is used in places that assume strings use char\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1846, __extension__ __PRETTY_FUNCTION__)) |
1846 | "This function is used in places that assume strings use char")(static_cast <bool> (getCharByteWidth() == 1 && "This function is used in places that assume strings use char" ) ? void (0) : __assert_fail ("getCharByteWidth() == 1 && \"This function is used in places that assume strings use char\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1846, __extension__ __PRETTY_FUNCTION__)); |
1847 | return StringRef(getStrDataAsChar(), getByteLength()); |
1848 | } |
1849 | |
1850 | /// Allow access to clients that need the byte representation, such as |
1851 | /// ASTWriterStmt::VisitStringLiteral(). |
1852 | StringRef getBytes() const { |
1853 | // FIXME: StringRef may not be the right type to use as a result for this. |
1854 | return StringRef(getStrDataAsChar(), getByteLength()); |
1855 | } |
1856 | |
1857 | void outputString(raw_ostream &OS) const; |
1858 | |
1859 | uint32_t getCodeUnit(size_t i) const { |
1860 | assert(i < getLength() && "out of bounds access")(static_cast <bool> (i < getLength() && "out of bounds access" ) ? void (0) : __assert_fail ("i < getLength() && \"out of bounds access\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1860, __extension__ __PRETTY_FUNCTION__)); |
1861 | switch (getCharByteWidth()) { |
1862 | case 1: |
1863 | return static_cast<unsigned char>(getStrDataAsChar()[i]); |
1864 | case 2: |
1865 | return getStrDataAsUInt16()[i]; |
1866 | case 4: |
1867 | return getStrDataAsUInt32()[i]; |
1868 | } |
1869 | llvm_unreachable("Unsupported character width!")::llvm::llvm_unreachable_internal("Unsupported character width!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1869); |
1870 | } |
1871 | |
1872 | unsigned getByteLength() const { return getCharByteWidth() * getLength(); } |
1873 | unsigned getLength() const { return *getTrailingObjects<unsigned>(); } |
1874 | unsigned getCharByteWidth() const { return StringLiteralBits.CharByteWidth; } |
1875 | |
1876 | StringKind getKind() const { |
1877 | return static_cast<StringKind>(StringLiteralBits.Kind); |
1878 | } |
1879 | |
1880 | bool isAscii() const { return getKind() == Ascii; } |
1881 | bool isWide() const { return getKind() == Wide; } |
1882 | bool isUTF8() const { return getKind() == UTF8; } |
1883 | bool isUTF16() const { return getKind() == UTF16; } |
1884 | bool isUTF32() const { return getKind() == UTF32; } |
1885 | bool isPascal() const { return StringLiteralBits.IsPascal; } |
1886 | |
1887 | bool containsNonAscii() const { |
1888 | for (auto c : getString()) |
1889 | if (!isASCII(c)) |
1890 | return true; |
1891 | return false; |
1892 | } |
1893 | |
1894 | bool containsNonAsciiOrNull() const { |
1895 | for (auto c : getString()) |
1896 | if (!isASCII(c) || !c) |
1897 | return true; |
1898 | return false; |
1899 | } |
1900 | |
1901 | /// getNumConcatenated - Get the number of string literal tokens that were |
1902 | /// concatenated in translation phase #6 to form this string literal. |
1903 | unsigned getNumConcatenated() const { |
1904 | return StringLiteralBits.NumConcatenated; |
1905 | } |
1906 | |
1907 | /// Get one of the string literal token. |
1908 | SourceLocation getStrTokenLoc(unsigned TokNum) const { |
1909 | assert(TokNum < getNumConcatenated() && "Invalid tok number")(static_cast <bool> (TokNum < getNumConcatenated() && "Invalid tok number") ? void (0) : __assert_fail ("TokNum < getNumConcatenated() && \"Invalid tok number\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1909, __extension__ __PRETTY_FUNCTION__)); |
1910 | return getTrailingObjects<SourceLocation>()[TokNum]; |
1911 | } |
1912 | |
1913 | /// getLocationOfByte - Return a source location that points to the specified |
1914 | /// byte of this string literal. |
1915 | /// |
1916 | /// Strings are amazingly complex. They can be formed from multiple tokens |
1917 | /// and can have escape sequences in them in addition to the usual trigraph |
1918 | /// and escaped newline business. This routine handles this complexity. |
1919 | /// |
1920 | SourceLocation |
1921 | getLocationOfByte(unsigned ByteNo, const SourceManager &SM, |
1922 | const LangOptions &Features, const TargetInfo &Target, |
1923 | unsigned *StartToken = nullptr, |
1924 | unsigned *StartTokenByteOffset = nullptr) const; |
1925 | |
1926 | typedef const SourceLocation *tokloc_iterator; |
1927 | |
1928 | tokloc_iterator tokloc_begin() const { |
1929 | return getTrailingObjects<SourceLocation>(); |
1930 | } |
1931 | |
1932 | tokloc_iterator tokloc_end() const { |
1933 | return getTrailingObjects<SourceLocation>() + getNumConcatenated(); |
1934 | } |
1935 | |
1936 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return *tokloc_begin(); } |
1937 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return *(tokloc_end() - 1); } |
1938 | |
1939 | static bool classof(const Stmt *T) { |
1940 | return T->getStmtClass() == StringLiteralClass; |
1941 | } |
1942 | |
1943 | // Iterators |
1944 | child_range children() { |
1945 | return child_range(child_iterator(), child_iterator()); |
1946 | } |
1947 | const_child_range children() const { |
1948 | return const_child_range(const_child_iterator(), const_child_iterator()); |
1949 | } |
1950 | }; |
1951 | |
1952 | /// [C99 6.4.2.2] - A predefined identifier such as __func__. |
1953 | class PredefinedExpr final |
1954 | : public Expr, |
1955 | private llvm::TrailingObjects<PredefinedExpr, Stmt *> { |
1956 | friend class ASTStmtReader; |
1957 | friend TrailingObjects; |
1958 | |
1959 | // PredefinedExpr is optionally followed by a single trailing |
1960 | // "Stmt *" for the predefined identifier. It is present if and only if |
1961 | // hasFunctionName() is true and is always a "StringLiteral *". |
1962 | |
1963 | public: |
1964 | enum IdentKind { |
1965 | Func, |
1966 | Function, |
1967 | LFunction, // Same as Function, but as wide string. |
1968 | FuncDName, |
1969 | FuncSig, |
1970 | LFuncSig, // Same as FuncSig, but as as wide string |
1971 | PrettyFunction, |
1972 | /// The same as PrettyFunction, except that the |
1973 | /// 'virtual' keyword is omitted for virtual member functions. |
1974 | PrettyFunctionNoVirtual |
1975 | }; |
1976 | |
1977 | private: |
1978 | PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK, |
1979 | StringLiteral *SL); |
1980 | |
1981 | explicit PredefinedExpr(EmptyShell Empty, bool HasFunctionName); |
1982 | |
1983 | /// True if this PredefinedExpr has storage for a function name. |
1984 | bool hasFunctionName() const { return PredefinedExprBits.HasFunctionName; } |
1985 | |
1986 | void setFunctionName(StringLiteral *SL) { |
1987 | assert(hasFunctionName() &&(static_cast <bool> (hasFunctionName() && "This PredefinedExpr has no storage for a function name!" ) ? void (0) : __assert_fail ("hasFunctionName() && \"This PredefinedExpr has no storage for a function name!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1988, __extension__ __PRETTY_FUNCTION__)) |
1988 | "This PredefinedExpr has no storage for a function name!")(static_cast <bool> (hasFunctionName() && "This PredefinedExpr has no storage for a function name!" ) ? void (0) : __assert_fail ("hasFunctionName() && \"This PredefinedExpr has no storage for a function name!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 1988, __extension__ __PRETTY_FUNCTION__)); |
1989 | *getTrailingObjects<Stmt *>() = SL; |
1990 | } |
1991 | |
1992 | public: |
1993 | /// Create a PredefinedExpr. |
1994 | static PredefinedExpr *Create(const ASTContext &Ctx, SourceLocation L, |
1995 | QualType FNTy, IdentKind IK, StringLiteral *SL); |
1996 | |
1997 | /// Create an empty PredefinedExpr. |
1998 | static PredefinedExpr *CreateEmpty(const ASTContext &Ctx, |
1999 | bool HasFunctionName); |
2000 | |
2001 | IdentKind getIdentKind() const { |
2002 | return static_cast<IdentKind>(PredefinedExprBits.Kind); |
2003 | } |
2004 | |
2005 | SourceLocation getLocation() const { return PredefinedExprBits.Loc; } |
2006 | void setLocation(SourceLocation L) { PredefinedExprBits.Loc = L; } |
2007 | |
2008 | StringLiteral *getFunctionName() { |
2009 | return hasFunctionName() |
2010 | ? static_cast<StringLiteral *>(*getTrailingObjects<Stmt *>()) |
2011 | : nullptr; |
2012 | } |
2013 | |
2014 | const StringLiteral *getFunctionName() const { |
2015 | return hasFunctionName() |
2016 | ? static_cast<StringLiteral *>(*getTrailingObjects<Stmt *>()) |
2017 | : nullptr; |
2018 | } |
2019 | |
2020 | static StringRef getIdentKindName(IdentKind IK); |
2021 | StringRef getIdentKindName() const { |
2022 | return getIdentKindName(getIdentKind()); |
2023 | } |
2024 | |
2025 | static std::string ComputeName(IdentKind IK, const Decl *CurrentDecl); |
2026 | |
2027 | SourceLocation getBeginLoc() const { return getLocation(); } |
2028 | SourceLocation getEndLoc() const { return getLocation(); } |
2029 | |
2030 | static bool classof(const Stmt *T) { |
2031 | return T->getStmtClass() == PredefinedExprClass; |
2032 | } |
2033 | |
2034 | // Iterators |
2035 | child_range children() { |
2036 | return child_range(getTrailingObjects<Stmt *>(), |
2037 | getTrailingObjects<Stmt *>() + hasFunctionName()); |
2038 | } |
2039 | |
2040 | const_child_range children() const { |
2041 | return const_child_range(getTrailingObjects<Stmt *>(), |
2042 | getTrailingObjects<Stmt *>() + hasFunctionName()); |
2043 | } |
2044 | }; |
2045 | |
2046 | // This represents a use of the __builtin_sycl_unique_stable_name, which takes a |
2047 | // type-id, and at CodeGen time emits a unique string representation of the |
2048 | // type in a way that permits us to properly encode information about the SYCL |
2049 | // kernels. |
2050 | class SYCLUniqueStableNameExpr final : public Expr { |
2051 | friend class ASTStmtReader; |
2052 | SourceLocation OpLoc, LParen, RParen; |
2053 | TypeSourceInfo *TypeInfo; |
2054 | |
2055 | SYCLUniqueStableNameExpr(EmptyShell Empty, QualType ResultTy); |
2056 | SYCLUniqueStableNameExpr(SourceLocation OpLoc, SourceLocation LParen, |
2057 | SourceLocation RParen, QualType ResultTy, |
2058 | TypeSourceInfo *TSI); |
2059 | |
2060 | void setTypeSourceInfo(TypeSourceInfo *Ty) { TypeInfo = Ty; } |
2061 | |
2062 | void setLocation(SourceLocation L) { OpLoc = L; } |
2063 | void setLParenLocation(SourceLocation L) { LParen = L; } |
2064 | void setRParenLocation(SourceLocation L) { RParen = L; } |
2065 | |
2066 | public: |
2067 | TypeSourceInfo *getTypeSourceInfo() { return TypeInfo; } |
2068 | |
2069 | const TypeSourceInfo *getTypeSourceInfo() const { return TypeInfo; } |
2070 | |
2071 | static SYCLUniqueStableNameExpr * |
2072 | Create(const ASTContext &Ctx, SourceLocation OpLoc, SourceLocation LParen, |
2073 | SourceLocation RParen, TypeSourceInfo *TSI); |
2074 | |
2075 | static SYCLUniqueStableNameExpr *CreateEmpty(const ASTContext &Ctx); |
2076 | |
2077 | SourceLocation getBeginLoc() const { return getLocation(); } |
2078 | SourceLocation getEndLoc() const { return RParen; } |
2079 | SourceLocation getLocation() const { return OpLoc; } |
2080 | SourceLocation getLParenLocation() const { return LParen; } |
2081 | SourceLocation getRParenLocation() const { return RParen; } |
2082 | |
2083 | static bool classof(const Stmt *T) { |
2084 | return T->getStmtClass() == SYCLUniqueStableNameExprClass; |
2085 | } |
2086 | |
2087 | // Iterators |
2088 | child_range children() { |
2089 | return child_range(child_iterator(), child_iterator()); |
2090 | } |
2091 | |
2092 | const_child_range children() const { |
2093 | return const_child_range(const_child_iterator(), const_child_iterator()); |
2094 | } |
2095 | |
2096 | // Convenience function to generate the name of the currently stored type. |
2097 | std::string ComputeName(ASTContext &Context) const; |
2098 | |
2099 | // Get the generated name of the type. Note that this only works after all |
2100 | // kernels have been instantiated. |
2101 | static std::string ComputeName(ASTContext &Context, QualType Ty); |
2102 | }; |
2103 | |
2104 | /// ParenExpr - This represents a parethesized expression, e.g. "(1)". This |
2105 | /// AST node is only formed if full location information is requested. |
2106 | class ParenExpr : public Expr { |
2107 | SourceLocation L, R; |
2108 | Stmt *Val; |
2109 | public: |
2110 | ParenExpr(SourceLocation l, SourceLocation r, Expr *val) |
2111 | : Expr(ParenExprClass, val->getType(), val->getValueKind(), |
2112 | val->getObjectKind()), |
2113 | L(l), R(r), Val(val) { |
2114 | setDependence(computeDependence(this)); |
2115 | } |
2116 | |
2117 | /// Construct an empty parenthesized expression. |
2118 | explicit ParenExpr(EmptyShell Empty) |
2119 | : Expr(ParenExprClass, Empty) { } |
2120 | |
2121 | const Expr *getSubExpr() const { return cast<Expr>(Val); } |
2122 | Expr *getSubExpr() { return cast<Expr>(Val); } |
2123 | void setSubExpr(Expr *E) { Val = E; } |
2124 | |
2125 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return L; } |
2126 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return R; } |
2127 | |
2128 | /// Get the location of the left parentheses '('. |
2129 | SourceLocation getLParen() const { return L; } |
2130 | void setLParen(SourceLocation Loc) { L = Loc; } |
2131 | |
2132 | /// Get the location of the right parentheses ')'. |
2133 | SourceLocation getRParen() const { return R; } |
2134 | void setRParen(SourceLocation Loc) { R = Loc; } |
2135 | |
2136 | static bool classof(const Stmt *T) { |
2137 | return T->getStmtClass() == ParenExprClass; |
2138 | } |
2139 | |
2140 | // Iterators |
2141 | child_range children() { return child_range(&Val, &Val+1); } |
2142 | const_child_range children() const { |
2143 | return const_child_range(&Val, &Val + 1); |
2144 | } |
2145 | }; |
2146 | |
2147 | /// UnaryOperator - This represents the unary-expression's (except sizeof and |
2148 | /// alignof), the postinc/postdec operators from postfix-expression, and various |
2149 | /// extensions. |
2150 | /// |
2151 | /// Notes on various nodes: |
2152 | /// |
2153 | /// Real/Imag - These return the real/imag part of a complex operand. If |
2154 | /// applied to a non-complex value, the former returns its operand and the |
2155 | /// later returns zero in the type of the operand. |
2156 | /// |
2157 | class UnaryOperator final |
2158 | : public Expr, |
2159 | private llvm::TrailingObjects<UnaryOperator, FPOptionsOverride> { |
2160 | Stmt *Val; |
2161 | |
2162 | size_t numTrailingObjects(OverloadToken<FPOptionsOverride>) const { |
2163 | return UnaryOperatorBits.HasFPFeatures ? 1 : 0; |
2164 | } |
2165 | |
2166 | FPOptionsOverride &getTrailingFPFeatures() { |
2167 | assert(UnaryOperatorBits.HasFPFeatures)(static_cast <bool> (UnaryOperatorBits.HasFPFeatures) ? void (0) : __assert_fail ("UnaryOperatorBits.HasFPFeatures", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2167, __extension__ __PRETTY_FUNCTION__)); |
2168 | return *getTrailingObjects<FPOptionsOverride>(); |
2169 | } |
2170 | |
2171 | const FPOptionsOverride &getTrailingFPFeatures() const { |
2172 | assert(UnaryOperatorBits.HasFPFeatures)(static_cast <bool> (UnaryOperatorBits.HasFPFeatures) ? void (0) : __assert_fail ("UnaryOperatorBits.HasFPFeatures", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2172, __extension__ __PRETTY_FUNCTION__)); |
2173 | return *getTrailingObjects<FPOptionsOverride>(); |
2174 | } |
2175 | |
2176 | public: |
2177 | typedef UnaryOperatorKind Opcode; |
2178 | |
2179 | protected: |
2180 | UnaryOperator(const ASTContext &Ctx, Expr *input, Opcode opc, QualType type, |
2181 | ExprValueKind VK, ExprObjectKind OK, SourceLocation l, |
2182 | bool CanOverflow, FPOptionsOverride FPFeatures); |
2183 | |
2184 | /// Build an empty unary operator. |
2185 | explicit UnaryOperator(bool HasFPFeatures, EmptyShell Empty) |
2186 | : Expr(UnaryOperatorClass, Empty) { |
2187 | UnaryOperatorBits.Opc = UO_AddrOf; |
2188 | UnaryOperatorBits.HasFPFeatures = HasFPFeatures; |
2189 | } |
2190 | |
2191 | public: |
2192 | static UnaryOperator *CreateEmpty(const ASTContext &C, bool hasFPFeatures); |
2193 | |
2194 | static UnaryOperator *Create(const ASTContext &C, Expr *input, Opcode opc, |
2195 | QualType type, ExprValueKind VK, |
2196 | ExprObjectKind OK, SourceLocation l, |
2197 | bool CanOverflow, FPOptionsOverride FPFeatures); |
2198 | |
2199 | Opcode getOpcode() const { |
2200 | return static_cast<Opcode>(UnaryOperatorBits.Opc); |
2201 | } |
2202 | void setOpcode(Opcode Opc) { UnaryOperatorBits.Opc = Opc; } |
2203 | |
2204 | Expr *getSubExpr() const { return cast<Expr>(Val); } |
2205 | void setSubExpr(Expr *E) { Val = E; } |
2206 | |
2207 | /// getOperatorLoc - Return the location of the operator. |
2208 | SourceLocation getOperatorLoc() const { return UnaryOperatorBits.Loc; } |
2209 | void setOperatorLoc(SourceLocation L) { UnaryOperatorBits.Loc = L; } |
2210 | |
2211 | /// Returns true if the unary operator can cause an overflow. For instance, |
2212 | /// signed int i = INT_MAX; i++; |
2213 | /// signed char c = CHAR_MAX; c++; |
2214 | /// Due to integer promotions, c++ is promoted to an int before the postfix |
2215 | /// increment, and the result is an int that cannot overflow. However, i++ |
2216 | /// can overflow. |
2217 | bool canOverflow() const { return UnaryOperatorBits.CanOverflow; } |
2218 | void setCanOverflow(bool C) { UnaryOperatorBits.CanOverflow = C; } |
2219 | |
2220 | // Get the FP contractability status of this operator. Only meaningful for |
2221 | // operations on floating point types. |
2222 | bool isFPContractableWithinStatement(const LangOptions &LO) const { |
2223 | return getFPFeaturesInEffect(LO).allowFPContractWithinStatement(); |
2224 | } |
2225 | |
2226 | // Get the FENV_ACCESS status of this operator. Only meaningful for |
2227 | // operations on floating point types. |
2228 | bool isFEnvAccessOn(const LangOptions &LO) const { |
2229 | return getFPFeaturesInEffect(LO).getAllowFEnvAccess(); |
2230 | } |
2231 | |
2232 | /// isPostfix - Return true if this is a postfix operation, like x++. |
2233 | static bool isPostfix(Opcode Op) { |
2234 | return Op == UO_PostInc || Op == UO_PostDec; |
2235 | } |
2236 | |
2237 | /// isPrefix - Return true if this is a prefix operation, like --x. |
2238 | static bool isPrefix(Opcode Op) { |
2239 | return Op == UO_PreInc || Op == UO_PreDec; |
2240 | } |
2241 | |
2242 | bool isPrefix() const { return isPrefix(getOpcode()); } |
2243 | bool isPostfix() const { return isPostfix(getOpcode()); } |
2244 | |
2245 | static bool isIncrementOp(Opcode Op) { |
2246 | return Op == UO_PreInc || Op == UO_PostInc; |
2247 | } |
2248 | bool isIncrementOp() const { |
2249 | return isIncrementOp(getOpcode()); |
2250 | } |
2251 | |
2252 | static bool isDecrementOp(Opcode Op) { |
2253 | return Op == UO_PreDec || Op == UO_PostDec; |
2254 | } |
2255 | bool isDecrementOp() const { |
2256 | return isDecrementOp(getOpcode()); |
2257 | } |
2258 | |
2259 | static bool isIncrementDecrementOp(Opcode Op) { return Op <= UO_PreDec; } |
2260 | bool isIncrementDecrementOp() const { |
2261 | return isIncrementDecrementOp(getOpcode()); |
2262 | } |
2263 | |
2264 | static bool isArithmeticOp(Opcode Op) { |
2265 | return Op >= UO_Plus && Op <= UO_LNot; |
2266 | } |
2267 | bool isArithmeticOp() const { return isArithmeticOp(getOpcode()); } |
2268 | |
2269 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
2270 | /// corresponds to, e.g. "sizeof" or "[pre]++" |
2271 | static StringRef getOpcodeStr(Opcode Op); |
2272 | |
2273 | /// Retrieve the unary opcode that corresponds to the given |
2274 | /// overloaded operator. |
2275 | static Opcode getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix); |
2276 | |
2277 | /// Retrieve the overloaded operator kind that corresponds to |
2278 | /// the given unary opcode. |
2279 | static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); |
2280 | |
2281 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
2282 | return isPostfix() ? Val->getBeginLoc() : getOperatorLoc(); |
2283 | } |
2284 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
2285 | return isPostfix() ? getOperatorLoc() : Val->getEndLoc(); |
2286 | } |
2287 | SourceLocation getExprLoc() const { return getOperatorLoc(); } |
2288 | |
2289 | static bool classof(const Stmt *T) { |
2290 | return T->getStmtClass() == UnaryOperatorClass; |
2291 | } |
2292 | |
2293 | // Iterators |
2294 | child_range children() { return child_range(&Val, &Val+1); } |
2295 | const_child_range children() const { |
2296 | return const_child_range(&Val, &Val + 1); |
2297 | } |
2298 | |
2299 | /// Is FPFeatures in Trailing Storage? |
2300 | bool hasStoredFPFeatures() const { return UnaryOperatorBits.HasFPFeatures; } |
2301 | |
2302 | /// Get FPFeatures from trailing storage. |
2303 | FPOptionsOverride getStoredFPFeatures() const { |
2304 | return getTrailingFPFeatures(); |
2305 | } |
2306 | |
2307 | protected: |
2308 | /// Set FPFeatures in trailing storage, used only by Serialization |
2309 | void setStoredFPFeatures(FPOptionsOverride F) { getTrailingFPFeatures() = F; } |
2310 | |
2311 | public: |
2312 | // Get the FP features status of this operator. Only meaningful for |
2313 | // operations on floating point types. |
2314 | FPOptions getFPFeaturesInEffect(const LangOptions &LO) const { |
2315 | if (UnaryOperatorBits.HasFPFeatures) |
2316 | return getStoredFPFeatures().applyOverrides(LO); |
2317 | return FPOptions::defaultWithoutTrailingStorage(LO); |
2318 | } |
2319 | FPOptionsOverride getFPOptionsOverride() const { |
2320 | if (UnaryOperatorBits.HasFPFeatures) |
2321 | return getStoredFPFeatures(); |
2322 | return FPOptionsOverride(); |
2323 | } |
2324 | |
2325 | friend TrailingObjects; |
2326 | friend class ASTReader; |
2327 | friend class ASTStmtReader; |
2328 | friend class ASTStmtWriter; |
2329 | }; |
2330 | |
2331 | /// Helper class for OffsetOfExpr. |
2332 | |
2333 | // __builtin_offsetof(type, identifier(.identifier|[expr])*) |
2334 | class OffsetOfNode { |
2335 | public: |
2336 | /// The kind of offsetof node we have. |
2337 | enum Kind { |
2338 | /// An index into an array. |
2339 | Array = 0x00, |
2340 | /// A field. |
2341 | Field = 0x01, |
2342 | /// A field in a dependent type, known only by its name. |
2343 | Identifier = 0x02, |
2344 | /// An implicit indirection through a C++ base class, when the |
2345 | /// field found is in a base class. |
2346 | Base = 0x03 |
2347 | }; |
2348 | |
2349 | private: |
2350 | enum { MaskBits = 2, Mask = 0x03 }; |
2351 | |
2352 | /// The source range that covers this part of the designator. |
2353 | SourceRange Range; |
2354 | |
2355 | /// The data describing the designator, which comes in three |
2356 | /// different forms, depending on the lower two bits. |
2357 | /// - An unsigned index into the array of Expr*'s stored after this node |
2358 | /// in memory, for [constant-expression] designators. |
2359 | /// - A FieldDecl*, for references to a known field. |
2360 | /// - An IdentifierInfo*, for references to a field with a given name |
2361 | /// when the class type is dependent. |
2362 | /// - A CXXBaseSpecifier*, for references that look at a field in a |
2363 | /// base class. |
2364 | uintptr_t Data; |
2365 | |
2366 | public: |
2367 | /// Create an offsetof node that refers to an array element. |
2368 | OffsetOfNode(SourceLocation LBracketLoc, unsigned Index, |
2369 | SourceLocation RBracketLoc) |
2370 | : Range(LBracketLoc, RBracketLoc), Data((Index << 2) | Array) {} |
2371 | |
2372 | /// Create an offsetof node that refers to a field. |
2373 | OffsetOfNode(SourceLocation DotLoc, FieldDecl *Field, SourceLocation NameLoc) |
2374 | : Range(DotLoc.isValid() ? DotLoc : NameLoc, NameLoc), |
2375 | Data(reinterpret_cast<uintptr_t>(Field) | OffsetOfNode::Field) {} |
2376 | |
2377 | /// Create an offsetof node that refers to an identifier. |
2378 | OffsetOfNode(SourceLocation DotLoc, IdentifierInfo *Name, |
2379 | SourceLocation NameLoc) |
2380 | : Range(DotLoc.isValid() ? DotLoc : NameLoc, NameLoc), |
2381 | Data(reinterpret_cast<uintptr_t>(Name) | Identifier) {} |
2382 | |
2383 | /// Create an offsetof node that refers into a C++ base class. |
2384 | explicit OffsetOfNode(const CXXBaseSpecifier *Base) |
2385 | : Range(), Data(reinterpret_cast<uintptr_t>(Base) | OffsetOfNode::Base) {} |
2386 | |
2387 | /// Determine what kind of offsetof node this is. |
2388 | Kind getKind() const { return static_cast<Kind>(Data & Mask); } |
2389 | |
2390 | /// For an array element node, returns the index into the array |
2391 | /// of expressions. |
2392 | unsigned getArrayExprIndex() const { |
2393 | assert(getKind() == Array)(static_cast <bool> (getKind() == Array) ? void (0) : __assert_fail ("getKind() == Array", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2393, __extension__ __PRETTY_FUNCTION__)); |
2394 | return Data >> 2; |
2395 | } |
2396 | |
2397 | /// For a field offsetof node, returns the field. |
2398 | FieldDecl *getField() const { |
2399 | assert(getKind() == Field)(static_cast <bool> (getKind() == Field) ? void (0) : __assert_fail ("getKind() == Field", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2399, __extension__ __PRETTY_FUNCTION__)); |
2400 | return reinterpret_cast<FieldDecl *>(Data & ~(uintptr_t)Mask); |
2401 | } |
2402 | |
2403 | /// For a field or identifier offsetof node, returns the name of |
2404 | /// the field. |
2405 | IdentifierInfo *getFieldName() const; |
2406 | |
2407 | /// For a base class node, returns the base specifier. |
2408 | CXXBaseSpecifier *getBase() const { |
2409 | assert(getKind() == Base)(static_cast <bool> (getKind() == Base) ? void (0) : __assert_fail ("getKind() == Base", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2409, __extension__ __PRETTY_FUNCTION__)); |
2410 | return reinterpret_cast<CXXBaseSpecifier *>(Data & ~(uintptr_t)Mask); |
2411 | } |
2412 | |
2413 | /// Retrieve the source range that covers this offsetof node. |
2414 | /// |
2415 | /// For an array element node, the source range contains the locations of |
2416 | /// the square brackets. For a field or identifier node, the source range |
2417 | /// contains the location of the period (if there is one) and the |
2418 | /// identifier. |
2419 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
2420 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
2421 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
2422 | }; |
2423 | |
2424 | /// OffsetOfExpr - [C99 7.17] - This represents an expression of the form |
2425 | /// offsetof(record-type, member-designator). For example, given: |
2426 | /// @code |
2427 | /// struct S { |
2428 | /// float f; |
2429 | /// double d; |
2430 | /// }; |
2431 | /// struct T { |
2432 | /// int i; |
2433 | /// struct S s[10]; |
2434 | /// }; |
2435 | /// @endcode |
2436 | /// we can represent and evaluate the expression @c offsetof(struct T, s[2].d). |
2437 | |
2438 | class OffsetOfExpr final |
2439 | : public Expr, |
2440 | private llvm::TrailingObjects<OffsetOfExpr, OffsetOfNode, Expr *> { |
2441 | SourceLocation OperatorLoc, RParenLoc; |
2442 | // Base type; |
2443 | TypeSourceInfo *TSInfo; |
2444 | // Number of sub-components (i.e. instances of OffsetOfNode). |
2445 | unsigned NumComps; |
2446 | // Number of sub-expressions (i.e. array subscript expressions). |
2447 | unsigned NumExprs; |
2448 | |
2449 | size_t numTrailingObjects(OverloadToken<OffsetOfNode>) const { |
2450 | return NumComps; |
2451 | } |
2452 | |
2453 | OffsetOfExpr(const ASTContext &C, QualType type, |
2454 | SourceLocation OperatorLoc, TypeSourceInfo *tsi, |
2455 | ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs, |
2456 | SourceLocation RParenLoc); |
2457 | |
2458 | explicit OffsetOfExpr(unsigned numComps, unsigned numExprs) |
2459 | : Expr(OffsetOfExprClass, EmptyShell()), |
2460 | TSInfo(nullptr), NumComps(numComps), NumExprs(numExprs) {} |
2461 | |
2462 | public: |
2463 | |
2464 | static OffsetOfExpr *Create(const ASTContext &C, QualType type, |
2465 | SourceLocation OperatorLoc, TypeSourceInfo *tsi, |
2466 | ArrayRef<OffsetOfNode> comps, |
2467 | ArrayRef<Expr*> exprs, SourceLocation RParenLoc); |
2468 | |
2469 | static OffsetOfExpr *CreateEmpty(const ASTContext &C, |
2470 | unsigned NumComps, unsigned NumExprs); |
2471 | |
2472 | /// getOperatorLoc - Return the location of the operator. |
2473 | SourceLocation getOperatorLoc() const { return OperatorLoc; } |
2474 | void setOperatorLoc(SourceLocation L) { OperatorLoc = L; } |
2475 | |
2476 | /// Return the location of the right parentheses. |
2477 | SourceLocation getRParenLoc() const { return RParenLoc; } |
2478 | void setRParenLoc(SourceLocation R) { RParenLoc = R; } |
2479 | |
2480 | TypeSourceInfo *getTypeSourceInfo() const { |
2481 | return TSInfo; |
2482 | } |
2483 | void setTypeSourceInfo(TypeSourceInfo *tsi) { |
2484 | TSInfo = tsi; |
2485 | } |
2486 | |
2487 | const OffsetOfNode &getComponent(unsigned Idx) const { |
2488 | assert(Idx < NumComps && "Subscript out of range")(static_cast <bool> (Idx < NumComps && "Subscript out of range" ) ? void (0) : __assert_fail ("Idx < NumComps && \"Subscript out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2488, __extension__ __PRETTY_FUNCTION__)); |
2489 | return getTrailingObjects<OffsetOfNode>()[Idx]; |
2490 | } |
2491 | |
2492 | void setComponent(unsigned Idx, OffsetOfNode ON) { |
2493 | assert(Idx < NumComps && "Subscript out of range")(static_cast <bool> (Idx < NumComps && "Subscript out of range" ) ? void (0) : __assert_fail ("Idx < NumComps && \"Subscript out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2493, __extension__ __PRETTY_FUNCTION__)); |
2494 | getTrailingObjects<OffsetOfNode>()[Idx] = ON; |
2495 | } |
2496 | |
2497 | unsigned getNumComponents() const { |
2498 | return NumComps; |
2499 | } |
2500 | |
2501 | Expr* getIndexExpr(unsigned Idx) { |
2502 | assert(Idx < NumExprs && "Subscript out of range")(static_cast <bool> (Idx < NumExprs && "Subscript out of range" ) ? void (0) : __assert_fail ("Idx < NumExprs && \"Subscript out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2502, __extension__ __PRETTY_FUNCTION__)); |
2503 | return getTrailingObjects<Expr *>()[Idx]; |
2504 | } |
2505 | |
2506 | const Expr *getIndexExpr(unsigned Idx) const { |
2507 | assert(Idx < NumExprs && "Subscript out of range")(static_cast <bool> (Idx < NumExprs && "Subscript out of range" ) ? void (0) : __assert_fail ("Idx < NumExprs && \"Subscript out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2507, __extension__ __PRETTY_FUNCTION__)); |
2508 | return getTrailingObjects<Expr *>()[Idx]; |
2509 | } |
2510 | |
2511 | void setIndexExpr(unsigned Idx, Expr* E) { |
2512 | assert(Idx < NumComps && "Subscript out of range")(static_cast <bool> (Idx < NumComps && "Subscript out of range" ) ? void (0) : __assert_fail ("Idx < NumComps && \"Subscript out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2512, __extension__ __PRETTY_FUNCTION__)); |
2513 | getTrailingObjects<Expr *>()[Idx] = E; |
2514 | } |
2515 | |
2516 | unsigned getNumExpressions() const { |
2517 | return NumExprs; |
2518 | } |
2519 | |
2520 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return OperatorLoc; } |
2521 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
2522 | |
2523 | static bool classof(const Stmt *T) { |
2524 | return T->getStmtClass() == OffsetOfExprClass; |
2525 | } |
2526 | |
2527 | // Iterators |
2528 | child_range children() { |
2529 | Stmt **begin = reinterpret_cast<Stmt **>(getTrailingObjects<Expr *>()); |
2530 | return child_range(begin, begin + NumExprs); |
2531 | } |
2532 | const_child_range children() const { |
2533 | Stmt *const *begin = |
2534 | reinterpret_cast<Stmt *const *>(getTrailingObjects<Expr *>()); |
2535 | return const_child_range(begin, begin + NumExprs); |
2536 | } |
2537 | friend TrailingObjects; |
2538 | }; |
2539 | |
2540 | /// UnaryExprOrTypeTraitExpr - expression with either a type or (unevaluated) |
2541 | /// expression operand. Used for sizeof/alignof (C99 6.5.3.4) and |
2542 | /// vec_step (OpenCL 1.1 6.11.12). |
2543 | class UnaryExprOrTypeTraitExpr : public Expr { |
2544 | union { |
2545 | TypeSourceInfo *Ty; |
2546 | Stmt *Ex; |
2547 | } Argument; |
2548 | SourceLocation OpLoc, RParenLoc; |
2549 | |
2550 | public: |
2551 | UnaryExprOrTypeTraitExpr(UnaryExprOrTypeTrait ExprKind, TypeSourceInfo *TInfo, |
2552 | QualType resultType, SourceLocation op, |
2553 | SourceLocation rp) |
2554 | : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_PRValue, |
2555 | OK_Ordinary), |
2556 | OpLoc(op), RParenLoc(rp) { |
2557 | assert(ExprKind <= UETT_Last && "invalid enum value!")(static_cast <bool> (ExprKind <= UETT_Last && "invalid enum value!") ? void (0) : __assert_fail ("ExprKind <= UETT_Last && \"invalid enum value!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2557, __extension__ __PRETTY_FUNCTION__)); |
2558 | UnaryExprOrTypeTraitExprBits.Kind = ExprKind; |
2559 | assert(static_cast<unsigned>(ExprKind) ==(static_cast <bool> (static_cast<unsigned>(ExprKind ) == UnaryExprOrTypeTraitExprBits.Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!" ) ? void (0) : __assert_fail ("static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2561, __extension__ __PRETTY_FUNCTION__)) |
2560 | UnaryExprOrTypeTraitExprBits.Kind &&(static_cast <bool> (static_cast<unsigned>(ExprKind ) == UnaryExprOrTypeTraitExprBits.Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!" ) ? void (0) : __assert_fail ("static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2561, __extension__ __PRETTY_FUNCTION__)) |
2561 | "UnaryExprOrTypeTraitExprBits.Kind overflow!")(static_cast <bool> (static_cast<unsigned>(ExprKind ) == UnaryExprOrTypeTraitExprBits.Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!" ) ? void (0) : __assert_fail ("static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2561, __extension__ __PRETTY_FUNCTION__)); |
2562 | UnaryExprOrTypeTraitExprBits.IsType = true; |
2563 | Argument.Ty = TInfo; |
2564 | setDependence(computeDependence(this)); |
2565 | } |
2566 | |
2567 | UnaryExprOrTypeTraitExpr(UnaryExprOrTypeTrait ExprKind, Expr *E, |
2568 | QualType resultType, SourceLocation op, |
2569 | SourceLocation rp); |
2570 | |
2571 | /// Construct an empty sizeof/alignof expression. |
2572 | explicit UnaryExprOrTypeTraitExpr(EmptyShell Empty) |
2573 | : Expr(UnaryExprOrTypeTraitExprClass, Empty) { } |
2574 | |
2575 | UnaryExprOrTypeTrait getKind() const { |
2576 | return static_cast<UnaryExprOrTypeTrait>(UnaryExprOrTypeTraitExprBits.Kind); |
2577 | } |
2578 | void setKind(UnaryExprOrTypeTrait K) { |
2579 | assert(K <= UETT_Last && "invalid enum value!")(static_cast <bool> (K <= UETT_Last && "invalid enum value!" ) ? void (0) : __assert_fail ("K <= UETT_Last && \"invalid enum value!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2579, __extension__ __PRETTY_FUNCTION__)); |
2580 | UnaryExprOrTypeTraitExprBits.Kind = K; |
2581 | assert(static_cast<unsigned>(K) == UnaryExprOrTypeTraitExprBits.Kind &&(static_cast <bool> (static_cast<unsigned>(K) == UnaryExprOrTypeTraitExprBits .Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!" ) ? void (0) : __assert_fail ("static_cast<unsigned>(K) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2582, __extension__ __PRETTY_FUNCTION__)) |
2582 | "UnaryExprOrTypeTraitExprBits.Kind overflow!")(static_cast <bool> (static_cast<unsigned>(K) == UnaryExprOrTypeTraitExprBits .Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!" ) ? void (0) : __assert_fail ("static_cast<unsigned>(K) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2582, __extension__ __PRETTY_FUNCTION__)); |
2583 | } |
2584 | |
2585 | bool isArgumentType() const { return UnaryExprOrTypeTraitExprBits.IsType; } |
2586 | QualType getArgumentType() const { |
2587 | return getArgumentTypeInfo()->getType(); |
2588 | } |
2589 | TypeSourceInfo *getArgumentTypeInfo() const { |
2590 | assert(isArgumentType() && "calling getArgumentType() when arg is expr")(static_cast <bool> (isArgumentType() && "calling getArgumentType() when arg is expr" ) ? void (0) : __assert_fail ("isArgumentType() && \"calling getArgumentType() when arg is expr\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2590, __extension__ __PRETTY_FUNCTION__)); |
2591 | return Argument.Ty; |
2592 | } |
2593 | Expr *getArgumentExpr() { |
2594 | assert(!isArgumentType() && "calling getArgumentExpr() when arg is type")(static_cast <bool> (!isArgumentType() && "calling getArgumentExpr() when arg is type" ) ? void (0) : __assert_fail ("!isArgumentType() && \"calling getArgumentExpr() when arg is type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2594, __extension__ __PRETTY_FUNCTION__)); |
2595 | return static_cast<Expr*>(Argument.Ex); |
2596 | } |
2597 | const Expr *getArgumentExpr() const { |
2598 | return const_cast<UnaryExprOrTypeTraitExpr*>(this)->getArgumentExpr(); |
2599 | } |
2600 | |
2601 | void setArgument(Expr *E) { |
2602 | Argument.Ex = E; |
2603 | UnaryExprOrTypeTraitExprBits.IsType = false; |
2604 | } |
2605 | void setArgument(TypeSourceInfo *TInfo) { |
2606 | Argument.Ty = TInfo; |
2607 | UnaryExprOrTypeTraitExprBits.IsType = true; |
2608 | } |
2609 | |
2610 | /// Gets the argument type, or the type of the argument expression, whichever |
2611 | /// is appropriate. |
2612 | QualType getTypeOfArgument() const { |
2613 | return isArgumentType() ? getArgumentType() : getArgumentExpr()->getType(); |
2614 | } |
2615 | |
2616 | SourceLocation getOperatorLoc() const { return OpLoc; } |
2617 | void setOperatorLoc(SourceLocation L) { OpLoc = L; } |
2618 | |
2619 | SourceLocation getRParenLoc() const { return RParenLoc; } |
2620 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
2621 | |
2622 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return OpLoc; } |
2623 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
2624 | |
2625 | static bool classof(const Stmt *T) { |
2626 | return T->getStmtClass() == UnaryExprOrTypeTraitExprClass; |
2627 | } |
2628 | |
2629 | // Iterators |
2630 | child_range children(); |
2631 | const_child_range children() const; |
2632 | }; |
2633 | |
2634 | //===----------------------------------------------------------------------===// |
2635 | // Postfix Operators. |
2636 | //===----------------------------------------------------------------------===// |
2637 | |
2638 | /// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. |
2639 | class ArraySubscriptExpr : public Expr { |
2640 | enum { LHS, RHS, END_EXPR }; |
2641 | Stmt *SubExprs[END_EXPR]; |
2642 | |
2643 | bool lhsIsBase() const { return getRHS()->getType()->isIntegerType(); } |
2644 | |
2645 | public: |
2646 | ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, ExprValueKind VK, |
2647 | ExprObjectKind OK, SourceLocation rbracketloc) |
2648 | : Expr(ArraySubscriptExprClass, t, VK, OK) { |
2649 | SubExprs[LHS] = lhs; |
2650 | SubExprs[RHS] = rhs; |
2651 | ArrayOrMatrixSubscriptExprBits.RBracketLoc = rbracketloc; |
2652 | setDependence(computeDependence(this)); |
2653 | } |
2654 | |
2655 | /// Create an empty array subscript expression. |
2656 | explicit ArraySubscriptExpr(EmptyShell Shell) |
2657 | : Expr(ArraySubscriptExprClass, Shell) { } |
2658 | |
2659 | /// An array access can be written A[4] or 4[A] (both are equivalent). |
2660 | /// - getBase() and getIdx() always present the normalized view: A[4]. |
2661 | /// In this case getBase() returns "A" and getIdx() returns "4". |
2662 | /// - getLHS() and getRHS() present the syntactic view. e.g. for |
2663 | /// 4[A] getLHS() returns "4". |
2664 | /// Note: Because vector element access is also written A[4] we must |
2665 | /// predicate the format conversion in getBase and getIdx only on the |
2666 | /// the type of the RHS, as it is possible for the LHS to be a vector of |
2667 | /// integer type |
2668 | Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } |
2669 | const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
2670 | void setLHS(Expr *E) { SubExprs[LHS] = E; } |
2671 | |
2672 | Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } |
2673 | const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
2674 | void setRHS(Expr *E) { SubExprs[RHS] = E; } |
2675 | |
2676 | Expr *getBase() { return lhsIsBase() ? getLHS() : getRHS(); } |
2677 | const Expr *getBase() const { return lhsIsBase() ? getLHS() : getRHS(); } |
2678 | |
2679 | Expr *getIdx() { return lhsIsBase() ? getRHS() : getLHS(); } |
2680 | const Expr *getIdx() const { return lhsIsBase() ? getRHS() : getLHS(); } |
2681 | |
2682 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
2683 | return getLHS()->getBeginLoc(); |
2684 | } |
2685 | SourceLocation getEndLoc() const { return getRBracketLoc(); } |
2686 | |
2687 | SourceLocation getRBracketLoc() const { |
2688 | return ArrayOrMatrixSubscriptExprBits.RBracketLoc; |
2689 | } |
2690 | void setRBracketLoc(SourceLocation L) { |
2691 | ArrayOrMatrixSubscriptExprBits.RBracketLoc = L; |
2692 | } |
2693 | |
2694 | SourceLocation getExprLoc() const LLVM_READONLY__attribute__((__pure__)) { |
2695 | return getBase()->getExprLoc(); |
2696 | } |
2697 | |
2698 | static bool classof(const Stmt *T) { |
2699 | return T->getStmtClass() == ArraySubscriptExprClass; |
2700 | } |
2701 | |
2702 | // Iterators |
2703 | child_range children() { |
2704 | return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); |
2705 | } |
2706 | const_child_range children() const { |
2707 | return const_child_range(&SubExprs[0], &SubExprs[0] + END_EXPR); |
2708 | } |
2709 | }; |
2710 | |
2711 | /// MatrixSubscriptExpr - Matrix subscript expression for the MatrixType |
2712 | /// extension. |
2713 | /// MatrixSubscriptExpr can be either incomplete (only Base and RowIdx are set |
2714 | /// so far, the type is IncompleteMatrixIdx) or complete (Base, RowIdx and |
2715 | /// ColumnIdx refer to valid expressions). Incomplete matrix expressions only |
2716 | /// exist during the initial construction of the AST. |
2717 | class MatrixSubscriptExpr : public Expr { |
2718 | enum { BASE, ROW_IDX, COLUMN_IDX, END_EXPR }; |
2719 | Stmt *SubExprs[END_EXPR]; |
2720 | |
2721 | public: |
2722 | MatrixSubscriptExpr(Expr *Base, Expr *RowIdx, Expr *ColumnIdx, QualType T, |
2723 | SourceLocation RBracketLoc) |
2724 | : Expr(MatrixSubscriptExprClass, T, Base->getValueKind(), |
2725 | OK_MatrixComponent) { |
2726 | SubExprs[BASE] = Base; |
2727 | SubExprs[ROW_IDX] = RowIdx; |
2728 | SubExprs[COLUMN_IDX] = ColumnIdx; |
2729 | ArrayOrMatrixSubscriptExprBits.RBracketLoc = RBracketLoc; |
2730 | setDependence(computeDependence(this)); |
2731 | } |
2732 | |
2733 | /// Create an empty matrix subscript expression. |
2734 | explicit MatrixSubscriptExpr(EmptyShell Shell) |
2735 | : Expr(MatrixSubscriptExprClass, Shell) {} |
2736 | |
2737 | bool isIncomplete() const { |
2738 | bool IsIncomplete = hasPlaceholderType(BuiltinType::IncompleteMatrixIdx); |
2739 | assert((SubExprs[COLUMN_IDX] || IsIncomplete) &&(static_cast <bool> ((SubExprs[COLUMN_IDX] || IsIncomplete ) && "expressions without column index must be marked as incomplete" ) ? void (0) : __assert_fail ("(SubExprs[COLUMN_IDX] || IsIncomplete) && \"expressions without column index must be marked as incomplete\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2740, __extension__ __PRETTY_FUNCTION__)) |
2740 | "expressions without column index must be marked as incomplete")(static_cast <bool> ((SubExprs[COLUMN_IDX] || IsIncomplete ) && "expressions without column index must be marked as incomplete" ) ? void (0) : __assert_fail ("(SubExprs[COLUMN_IDX] || IsIncomplete) && \"expressions without column index must be marked as incomplete\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2740, __extension__ __PRETTY_FUNCTION__)); |
2741 | return IsIncomplete; |
2742 | } |
2743 | Expr *getBase() { return cast<Expr>(SubExprs[BASE]); } |
2744 | const Expr *getBase() const { return cast<Expr>(SubExprs[BASE]); } |
2745 | void setBase(Expr *E) { SubExprs[BASE] = E; } |
2746 | |
2747 | Expr *getRowIdx() { return cast<Expr>(SubExprs[ROW_IDX]); } |
2748 | const Expr *getRowIdx() const { return cast<Expr>(SubExprs[ROW_IDX]); } |
2749 | void setRowIdx(Expr *E) { SubExprs[ROW_IDX] = E; } |
2750 | |
2751 | Expr *getColumnIdx() { return cast_or_null<Expr>(SubExprs[COLUMN_IDX]); } |
2752 | const Expr *getColumnIdx() const { |
2753 | assert(!isIncomplete() &&(static_cast <bool> (!isIncomplete() && "cannot get the column index of an incomplete expression" ) ? void (0) : __assert_fail ("!isIncomplete() && \"cannot get the column index of an incomplete expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2754, __extension__ __PRETTY_FUNCTION__)) |
2754 | "cannot get the column index of an incomplete expression")(static_cast <bool> (!isIncomplete() && "cannot get the column index of an incomplete expression" ) ? void (0) : __assert_fail ("!isIncomplete() && \"cannot get the column index of an incomplete expression\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2754, __extension__ __PRETTY_FUNCTION__)); |
2755 | return cast<Expr>(SubExprs[COLUMN_IDX]); |
2756 | } |
2757 | void setColumnIdx(Expr *E) { SubExprs[COLUMN_IDX] = E; } |
2758 | |
2759 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
2760 | return getBase()->getBeginLoc(); |
2761 | } |
2762 | |
2763 | SourceLocation getEndLoc() const { return getRBracketLoc(); } |
2764 | |
2765 | SourceLocation getExprLoc() const LLVM_READONLY__attribute__((__pure__)) { |
2766 | return getBase()->getExprLoc(); |
2767 | } |
2768 | |
2769 | SourceLocation getRBracketLoc() const { |
2770 | return ArrayOrMatrixSubscriptExprBits.RBracketLoc; |
2771 | } |
2772 | void setRBracketLoc(SourceLocation L) { |
2773 | ArrayOrMatrixSubscriptExprBits.RBracketLoc = L; |
2774 | } |
2775 | |
2776 | static bool classof(const Stmt *T) { |
2777 | return T->getStmtClass() == MatrixSubscriptExprClass; |
2778 | } |
2779 | |
2780 | // Iterators |
2781 | child_range children() { |
2782 | return child_range(&SubExprs[0], &SubExprs[0] + END_EXPR); |
2783 | } |
2784 | const_child_range children() const { |
2785 | return const_child_range(&SubExprs[0], &SubExprs[0] + END_EXPR); |
2786 | } |
2787 | }; |
2788 | |
2789 | /// CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]). |
2790 | /// CallExpr itself represents a normal function call, e.g., "f(x, 2)", |
2791 | /// while its subclasses may represent alternative syntax that (semantically) |
2792 | /// results in a function call. For example, CXXOperatorCallExpr is |
2793 | /// a subclass for overloaded operator calls that use operator syntax, e.g., |
2794 | /// "str1 + str2" to resolve to a function call. |
2795 | class CallExpr : public Expr { |
2796 | enum { FN = 0, PREARGS_START = 1 }; |
2797 | |
2798 | /// The number of arguments in the call expression. |
2799 | unsigned NumArgs; |
2800 | |
2801 | /// The location of the right parenthese. This has a different meaning for |
2802 | /// the derived classes of CallExpr. |
2803 | SourceLocation RParenLoc; |
2804 | |
2805 | // CallExpr store some data in trailing objects. However since CallExpr |
2806 | // is used a base of other expression classes we cannot use |
2807 | // llvm::TrailingObjects. Instead we manually perform the pointer arithmetic |
2808 | // and casts. |
2809 | // |
2810 | // The trailing objects are in order: |
2811 | // |
2812 | // * A single "Stmt *" for the callee expression. |
2813 | // |
2814 | // * An array of getNumPreArgs() "Stmt *" for the pre-argument expressions. |
2815 | // |
2816 | // * An array of getNumArgs() "Stmt *" for the argument expressions. |
2817 | // |
2818 | // * An optional of type FPOptionsOverride. |
2819 | // |
2820 | // Note that we store the offset in bytes from the this pointer to the start |
2821 | // of the trailing objects. It would be perfectly possible to compute it |
2822 | // based on the dynamic kind of the CallExpr. However 1.) we have plenty of |
2823 | // space in the bit-fields of Stmt. 2.) It was benchmarked to be faster to |
2824 | // compute this once and then load the offset from the bit-fields of Stmt, |
2825 | // instead of re-computing the offset each time the trailing objects are |
2826 | // accessed. |
2827 | |
2828 | /// Return a pointer to the start of the trailing array of "Stmt *". |
2829 | Stmt **getTrailingStmts() { |
2830 | return reinterpret_cast<Stmt **>(reinterpret_cast<char *>(this) + |
2831 | CallExprBits.OffsetToTrailingObjects); |
2832 | } |
2833 | Stmt *const *getTrailingStmts() const { |
2834 | return const_cast<CallExpr *>(this)->getTrailingStmts(); |
2835 | } |
2836 | |
2837 | /// Map a statement class to the appropriate offset in bytes from the |
2838 | /// this pointer to the trailing objects. |
2839 | static unsigned offsetToTrailingObjects(StmtClass SC); |
2840 | |
2841 | unsigned getSizeOfTrailingStmts() const { |
2842 | return (1 + getNumPreArgs() + getNumArgs()) * sizeof(Stmt *); |
2843 | } |
2844 | |
2845 | size_t getOffsetOfTrailingFPFeatures() const { |
2846 | assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) : __assert_fail ("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2846, __extension__ __PRETTY_FUNCTION__)); |
2847 | return CallExprBits.OffsetToTrailingObjects + getSizeOfTrailingStmts(); |
2848 | } |
2849 | |
2850 | public: |
2851 | enum class ADLCallKind : bool { NotADL, UsesADL }; |
2852 | static constexpr ADLCallKind NotADL = ADLCallKind::NotADL; |
2853 | static constexpr ADLCallKind UsesADL = ADLCallKind::UsesADL; |
2854 | |
2855 | protected: |
2856 | /// Build a call expression, assuming that appropriate storage has been |
2857 | /// allocated for the trailing objects. |
2858 | CallExpr(StmtClass SC, Expr *Fn, ArrayRef<Expr *> PreArgs, |
2859 | ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK, |
2860 | SourceLocation RParenLoc, FPOptionsOverride FPFeatures, |
2861 | unsigned MinNumArgs, ADLCallKind UsesADL); |
2862 | |
2863 | /// Build an empty call expression, for deserialization. |
2864 | CallExpr(StmtClass SC, unsigned NumPreArgs, unsigned NumArgs, |
2865 | bool hasFPFeatures, EmptyShell Empty); |
2866 | |
2867 | /// Return the size in bytes needed for the trailing objects. |
2868 | /// Used by the derived classes to allocate the right amount of storage. |
2869 | static unsigned sizeOfTrailingObjects(unsigned NumPreArgs, unsigned NumArgs, |
2870 | bool HasFPFeatures) { |
2871 | return (1 + NumPreArgs + NumArgs) * sizeof(Stmt *) + |
2872 | HasFPFeatures * sizeof(FPOptionsOverride); |
2873 | } |
2874 | |
2875 | Stmt *getPreArg(unsigned I) { |
2876 | assert(I < getNumPreArgs() && "Prearg access out of range!")(static_cast <bool> (I < getNumPreArgs() && "Prearg access out of range!" ) ? void (0) : __assert_fail ("I < getNumPreArgs() && \"Prearg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2876, __extension__ __PRETTY_FUNCTION__)); |
2877 | return getTrailingStmts()[PREARGS_START + I]; |
2878 | } |
2879 | const Stmt *getPreArg(unsigned I) const { |
2880 | assert(I < getNumPreArgs() && "Prearg access out of range!")(static_cast <bool> (I < getNumPreArgs() && "Prearg access out of range!" ) ? void (0) : __assert_fail ("I < getNumPreArgs() && \"Prearg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2880, __extension__ __PRETTY_FUNCTION__)); |
2881 | return getTrailingStmts()[PREARGS_START + I]; |
2882 | } |
2883 | void setPreArg(unsigned I, Stmt *PreArg) { |
2884 | assert(I < getNumPreArgs() && "Prearg access out of range!")(static_cast <bool> (I < getNumPreArgs() && "Prearg access out of range!" ) ? void (0) : __assert_fail ("I < getNumPreArgs() && \"Prearg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2884, __extension__ __PRETTY_FUNCTION__)); |
2885 | getTrailingStmts()[PREARGS_START + I] = PreArg; |
2886 | } |
2887 | |
2888 | unsigned getNumPreArgs() const { return CallExprBits.NumPreArgs; } |
2889 | |
2890 | /// Return a pointer to the trailing FPOptions |
2891 | FPOptionsOverride *getTrailingFPFeatures() { |
2892 | assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) : __assert_fail ("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2892, __extension__ __PRETTY_FUNCTION__)); |
2893 | return reinterpret_cast<FPOptionsOverride *>( |
2894 | reinterpret_cast<char *>(this) + CallExprBits.OffsetToTrailingObjects + |
2895 | getSizeOfTrailingStmts()); |
2896 | } |
2897 | const FPOptionsOverride *getTrailingFPFeatures() const { |
2898 | assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) : __assert_fail ("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2898, __extension__ __PRETTY_FUNCTION__)); |
2899 | return reinterpret_cast<const FPOptionsOverride *>( |
2900 | reinterpret_cast<const char *>(this) + |
2901 | CallExprBits.OffsetToTrailingObjects + getSizeOfTrailingStmts()); |
2902 | } |
2903 | |
2904 | public: |
2905 | /// Create a call expression. |
2906 | /// \param Fn The callee expression, |
2907 | /// \param Args The argument array, |
2908 | /// \param Ty The type of the call expression (which is *not* the return |
2909 | /// type in general), |
2910 | /// \param VK The value kind of the call expression (lvalue, rvalue, ...), |
2911 | /// \param RParenLoc The location of the right parenthesis in the call |
2912 | /// expression. |
2913 | /// \param FPFeatures Floating-point features associated with the call, |
2914 | /// \param MinNumArgs Specifies the minimum number of arguments. The actual |
2915 | /// number of arguments will be the greater of Args.size() |
2916 | /// and MinNumArgs. This is used in a few places to allocate |
2917 | /// enough storage for the default arguments. |
2918 | /// \param UsesADL Specifies whether the callee was found through |
2919 | /// argument-dependent lookup. |
2920 | /// |
2921 | /// Note that you can use CreateTemporary if you need a temporary call |
2922 | /// expression on the stack. |
2923 | static CallExpr *Create(const ASTContext &Ctx, Expr *Fn, |
2924 | ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK, |
2925 | SourceLocation RParenLoc, |
2926 | FPOptionsOverride FPFeatures, unsigned MinNumArgs = 0, |
2927 | ADLCallKind UsesADL = NotADL); |
2928 | |
2929 | /// Create a temporary call expression with no arguments in the memory |
2930 | /// pointed to by Mem. Mem must points to at least sizeof(CallExpr) |
2931 | /// + sizeof(Stmt *) bytes of storage, aligned to alignof(CallExpr): |
2932 | /// |
2933 | /// \code{.cpp} |
2934 | /// alignas(CallExpr) char Buffer[sizeof(CallExpr) + sizeof(Stmt *)]; |
2935 | /// CallExpr *TheCall = CallExpr::CreateTemporary(Buffer, etc); |
2936 | /// \endcode |
2937 | static CallExpr *CreateTemporary(void *Mem, Expr *Fn, QualType Ty, |
2938 | ExprValueKind VK, SourceLocation RParenLoc, |
2939 | ADLCallKind UsesADL = NotADL); |
2940 | |
2941 | /// Create an empty call expression, for deserialization. |
2942 | static CallExpr *CreateEmpty(const ASTContext &Ctx, unsigned NumArgs, |
2943 | bool HasFPFeatures, EmptyShell Empty); |
2944 | |
2945 | Expr *getCallee() { return cast<Expr>(getTrailingStmts()[FN]); } |
2946 | const Expr *getCallee() const { return cast<Expr>(getTrailingStmts()[FN]); } |
2947 | void setCallee(Expr *F) { getTrailingStmts()[FN] = F; } |
2948 | |
2949 | ADLCallKind getADLCallKind() const { |
2950 | return static_cast<ADLCallKind>(CallExprBits.UsesADL); |
2951 | } |
2952 | void setADLCallKind(ADLCallKind V = UsesADL) { |
2953 | CallExprBits.UsesADL = static_cast<bool>(V); |
2954 | } |
2955 | bool usesADL() const { return getADLCallKind() == UsesADL; } |
2956 | |
2957 | bool hasStoredFPFeatures() const { return CallExprBits.HasFPFeatures; } |
2958 | |
2959 | Decl *getCalleeDecl() { return getCallee()->getReferencedDeclOfCallee(); } |
2960 | const Decl *getCalleeDecl() const { |
2961 | return getCallee()->getReferencedDeclOfCallee(); |
2962 | } |
2963 | |
2964 | /// If the callee is a FunctionDecl, return it. Otherwise return null. |
2965 | FunctionDecl *getDirectCallee() { |
2966 | return dyn_cast_or_null<FunctionDecl>(getCalleeDecl()); |
2967 | } |
2968 | const FunctionDecl *getDirectCallee() const { |
2969 | return dyn_cast_or_null<FunctionDecl>(getCalleeDecl()); |
2970 | } |
2971 | |
2972 | /// getNumArgs - Return the number of actual arguments to this call. |
2973 | unsigned getNumArgs() const { return NumArgs; } |
2974 | |
2975 | /// Retrieve the call arguments. |
2976 | Expr **getArgs() { |
2977 | return reinterpret_cast<Expr **>(getTrailingStmts() + PREARGS_START + |
2978 | getNumPreArgs()); |
2979 | } |
2980 | const Expr *const *getArgs() const { |
2981 | return reinterpret_cast<const Expr *const *>( |
2982 | getTrailingStmts() + PREARGS_START + getNumPreArgs()); |
2983 | } |
2984 | |
2985 | /// getArg - Return the specified argument. |
2986 | Expr *getArg(unsigned Arg) { |
2987 | assert(Arg < getNumArgs() && "Arg access out of range!")(static_cast <bool> (Arg < getNumArgs() && "Arg access out of range!" ) ? void (0) : __assert_fail ("Arg < getNumArgs() && \"Arg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2987, __extension__ __PRETTY_FUNCTION__)); |
2988 | return getArgs()[Arg]; |
2989 | } |
2990 | const Expr *getArg(unsigned Arg) const { |
2991 | assert(Arg < getNumArgs() && "Arg access out of range!")(static_cast <bool> (Arg < getNumArgs() && "Arg access out of range!" ) ? void (0) : __assert_fail ("Arg < getNumArgs() && \"Arg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 2991, __extension__ __PRETTY_FUNCTION__)); |
2992 | return getArgs()[Arg]; |
2993 | } |
2994 | |
2995 | /// setArg - Set the specified argument. |
2996 | /// ! the dependence bits might be stale after calling this setter, it is |
2997 | /// *caller*'s responsibility to recompute them by calling |
2998 | /// computeDependence(). |
2999 | void setArg(unsigned Arg, Expr *ArgExpr) { |
3000 | assert(Arg < getNumArgs() && "Arg access out of range!")(static_cast <bool> (Arg < getNumArgs() && "Arg access out of range!" ) ? void (0) : __assert_fail ("Arg < getNumArgs() && \"Arg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3000, __extension__ __PRETTY_FUNCTION__)); |
3001 | getArgs()[Arg] = ArgExpr; |
3002 | } |
3003 | |
3004 | /// Compute and set dependence bits. |
3005 | void computeDependence() { |
3006 | setDependence(clang::computeDependence( |
3007 | this, llvm::makeArrayRef( |
3008 | reinterpret_cast<Expr **>(getTrailingStmts() + PREARGS_START), |
3009 | getNumPreArgs()))); |
3010 | } |
3011 | |
3012 | /// Reduce the number of arguments in this call expression. This is used for |
3013 | /// example during error recovery to drop extra arguments. There is no way |
3014 | /// to perform the opposite because: 1.) We don't track how much storage |
3015 | /// we have for the argument array 2.) This would potentially require growing |
3016 | /// the argument array, something we cannot support since the arguments are |
3017 | /// stored in a trailing array. |
3018 | void shrinkNumArgs(unsigned NewNumArgs) { |
3019 | assert((NewNumArgs <= getNumArgs()) &&(static_cast <bool> ((NewNumArgs <= getNumArgs()) && "shrinkNumArgs cannot increase the number of arguments!") ? void (0) : __assert_fail ("(NewNumArgs <= getNumArgs()) && \"shrinkNumArgs cannot increase the number of arguments!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3020, __extension__ __PRETTY_FUNCTION__)) |
3020 | "shrinkNumArgs cannot increase the number of arguments!")(static_cast <bool> ((NewNumArgs <= getNumArgs()) && "shrinkNumArgs cannot increase the number of arguments!") ? void (0) : __assert_fail ("(NewNumArgs <= getNumArgs()) && \"shrinkNumArgs cannot increase the number of arguments!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3020, __extension__ __PRETTY_FUNCTION__)); |
3021 | NumArgs = NewNumArgs; |
3022 | } |
3023 | |
3024 | /// Bluntly set a new number of arguments without doing any checks whatsoever. |
3025 | /// Only used during construction of a CallExpr in a few places in Sema. |
3026 | /// FIXME: Find a way to remove it. |
3027 | void setNumArgsUnsafe(unsigned NewNumArgs) { NumArgs = NewNumArgs; } |
3028 | |
3029 | typedef ExprIterator arg_iterator; |
3030 | typedef ConstExprIterator const_arg_iterator; |
3031 | typedef llvm::iterator_range<arg_iterator> arg_range; |
3032 | typedef llvm::iterator_range<const_arg_iterator> const_arg_range; |
3033 | |
3034 | arg_range arguments() { return arg_range(arg_begin(), arg_end()); } |
3035 | const_arg_range arguments() const { |
3036 | return const_arg_range(arg_begin(), arg_end()); |
3037 | } |
3038 | |
3039 | arg_iterator arg_begin() { |
3040 | return getTrailingStmts() + PREARGS_START + getNumPreArgs(); |
3041 | } |
3042 | arg_iterator arg_end() { return arg_begin() + getNumArgs(); } |
3043 | |
3044 | const_arg_iterator arg_begin() const { |
3045 | return getTrailingStmts() + PREARGS_START + getNumPreArgs(); |
3046 | } |
3047 | const_arg_iterator arg_end() const { return arg_begin() + getNumArgs(); } |
3048 | |
3049 | /// This method provides fast access to all the subexpressions of |
3050 | /// a CallExpr without going through the slower virtual child_iterator |
3051 | /// interface. This provides efficient reverse iteration of the |
3052 | /// subexpressions. This is currently used for CFG construction. |
3053 | ArrayRef<Stmt *> getRawSubExprs() { |
3054 | return llvm::makeArrayRef(getTrailingStmts(), |
3055 | PREARGS_START + getNumPreArgs() + getNumArgs()); |
3056 | } |
3057 | |
3058 | /// getNumCommas - Return the number of commas that must have been present in |
3059 | /// this function call. |
3060 | unsigned getNumCommas() const { return getNumArgs() ? getNumArgs() - 1 : 0; } |
3061 | |
3062 | /// Get FPOptionsOverride from trailing storage. |
3063 | FPOptionsOverride getStoredFPFeatures() const { |
3064 | assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) : __assert_fail ("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3064, __extension__ __PRETTY_FUNCTION__)); |
3065 | return *getTrailingFPFeatures(); |
3066 | } |
3067 | /// Set FPOptionsOverride in trailing storage. Used only by Serialization. |
3068 | void setStoredFPFeatures(FPOptionsOverride F) { |
3069 | assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) : __assert_fail ("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3069, __extension__ __PRETTY_FUNCTION__)); |
3070 | *getTrailingFPFeatures() = F; |
3071 | } |
3072 | |
3073 | // Get the FP features status of this operator. Only meaningful for |
3074 | // operations on floating point types. |
3075 | FPOptions getFPFeaturesInEffect(const LangOptions &LO) const { |
3076 | if (hasStoredFPFeatures()) |
3077 | return getStoredFPFeatures().applyOverrides(LO); |
3078 | return FPOptions::defaultWithoutTrailingStorage(LO); |
3079 | } |
3080 | |
3081 | FPOptionsOverride getFPFeatures() const { |
3082 | if (hasStoredFPFeatures()) |
3083 | return getStoredFPFeatures(); |
3084 | return FPOptionsOverride(); |
3085 | } |
3086 | |
3087 | /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID |
3088 | /// of the callee. If not, return 0. |
3089 | unsigned getBuiltinCallee() const; |
3090 | |
3091 | /// Returns \c true if this is a call to a builtin which does not |
3092 | /// evaluate side-effects within its arguments. |
3093 | bool isUnevaluatedBuiltinCall(const ASTContext &Ctx) const; |
3094 | |
3095 | /// getCallReturnType - Get the return type of the call expr. This is not |
3096 | /// always the type of the expr itself, if the return type is a reference |
3097 | /// type. |
3098 | QualType getCallReturnType(const ASTContext &Ctx) const; |
3099 | |
3100 | /// Returns the WarnUnusedResultAttr that is either declared on the called |
3101 | /// function, or its return type declaration. |
3102 | const Attr *getUnusedResultAttr(const ASTContext &Ctx) const; |
3103 | |
3104 | /// Returns true if this call expression should warn on unused results. |
3105 | bool hasUnusedResultAttr(const ASTContext &Ctx) const { |
3106 | return getUnusedResultAttr(Ctx) != nullptr; |
3107 | } |
3108 | |
3109 | SourceLocation getRParenLoc() const { return RParenLoc; } |
3110 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
3111 | |
3112 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)); |
3113 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)); |
3114 | |
3115 | /// Return true if this is a call to __assume() or __builtin_assume() with |
3116 | /// a non-value-dependent constant parameter evaluating as false. |
3117 | bool isBuiltinAssumeFalse(const ASTContext &Ctx) const; |
3118 | |
3119 | /// Used by Sema to implement MSVC-compatible delayed name lookup. |
3120 | /// (Usually Exprs themselves should set dependence). |
3121 | void markDependentForPostponedNameLookup() { |
3122 | setDependence(getDependence() | ExprDependence::TypeValueInstantiation); |
3123 | } |
3124 | |
3125 | bool isCallToStdMove() const { |
3126 | const FunctionDecl *FD = getDirectCallee(); |
3127 | return getNumArgs() == 1 && FD && FD->isInStdNamespace() && |
3128 | FD->getIdentifier() && FD->getIdentifier()->isStr("move"); |
3129 | } |
3130 | |
3131 | static bool classof(const Stmt *T) { |
3132 | return T->getStmtClass() >= firstCallExprConstant && |
3133 | T->getStmtClass() <= lastCallExprConstant; |
3134 | } |
3135 | |
3136 | // Iterators |
3137 | child_range children() { |
3138 | return child_range(getTrailingStmts(), getTrailingStmts() + PREARGS_START + |
3139 | getNumPreArgs() + getNumArgs()); |
3140 | } |
3141 | |
3142 | const_child_range children() const { |
3143 | return const_child_range(getTrailingStmts(), |
3144 | getTrailingStmts() + PREARGS_START + |
3145 | getNumPreArgs() + getNumArgs()); |
3146 | } |
3147 | }; |
3148 | |
3149 | /// Extra data stored in some MemberExpr objects. |
3150 | struct MemberExprNameQualifier { |
3151 | /// The nested-name-specifier that qualifies the name, including |
3152 | /// source-location information. |
3153 | NestedNameSpecifierLoc QualifierLoc; |
3154 | |
3155 | /// The DeclAccessPair through which the MemberDecl was found due to |
3156 | /// name qualifiers. |
3157 | DeclAccessPair FoundDecl; |
3158 | }; |
3159 | |
3160 | /// MemberExpr - [C99 6.5.2.3] Structure and Union Members. X->F and X.F. |
3161 | /// |
3162 | class MemberExpr final |
3163 | : public Expr, |
3164 | private llvm::TrailingObjects<MemberExpr, MemberExprNameQualifier, |
3165 | ASTTemplateKWAndArgsInfo, |
3166 | TemplateArgumentLoc> { |
3167 | friend class ASTReader; |
3168 | friend class ASTStmtReader; |
3169 | friend class ASTStmtWriter; |
3170 | friend TrailingObjects; |
3171 | |
3172 | /// Base - the expression for the base pointer or structure references. In |
3173 | /// X.F, this is "X". |
3174 | Stmt *Base; |
3175 | |
3176 | /// MemberDecl - This is the decl being referenced by the field/member name. |
3177 | /// In X.F, this is the decl referenced by F. |
3178 | ValueDecl *MemberDecl; |
3179 | |
3180 | /// MemberDNLoc - Provides source/type location info for the |
3181 | /// declaration name embedded in MemberDecl. |
3182 | DeclarationNameLoc MemberDNLoc; |
3183 | |
3184 | /// MemberLoc - This is the location of the member name. |
3185 | SourceLocation MemberLoc; |
3186 | |
3187 | size_t numTrailingObjects(OverloadToken<MemberExprNameQualifier>) const { |
3188 | return hasQualifierOrFoundDecl(); |
3189 | } |
3190 | |
3191 | size_t numTrailingObjects(OverloadToken<ASTTemplateKWAndArgsInfo>) const { |
3192 | return hasTemplateKWAndArgsInfo(); |
3193 | } |
3194 | |
3195 | bool hasQualifierOrFoundDecl() const { |
3196 | return MemberExprBits.HasQualifierOrFoundDecl; |
3197 | } |
3198 | |
3199 | bool hasTemplateKWAndArgsInfo() const { |
3200 | return MemberExprBits.HasTemplateKWAndArgsInfo; |
3201 | } |
3202 | |
3203 | MemberExpr(Expr *Base, bool IsArrow, SourceLocation OperatorLoc, |
3204 | ValueDecl *MemberDecl, const DeclarationNameInfo &NameInfo, |
3205 | QualType T, ExprValueKind VK, ExprObjectKind OK, |
3206 | NonOdrUseReason NOUR); |
3207 | MemberExpr(EmptyShell Empty) |
3208 | : Expr(MemberExprClass, Empty), Base(), MemberDecl() {} |
3209 | |
3210 | public: |
3211 | static MemberExpr *Create(const ASTContext &C, Expr *Base, bool IsArrow, |
3212 | SourceLocation OperatorLoc, |
3213 | NestedNameSpecifierLoc QualifierLoc, |
3214 | SourceLocation TemplateKWLoc, ValueDecl *MemberDecl, |
3215 | DeclAccessPair FoundDecl, |
3216 | DeclarationNameInfo MemberNameInfo, |
3217 | const TemplateArgumentListInfo *TemplateArgs, |
3218 | QualType T, ExprValueKind VK, ExprObjectKind OK, |
3219 | NonOdrUseReason NOUR); |
3220 | |
3221 | /// Create an implicit MemberExpr, with no location, qualifier, template |
3222 | /// arguments, and so on. Suitable only for non-static member access. |
3223 | static MemberExpr *CreateImplicit(const ASTContext &C, Expr *Base, |
3224 | bool IsArrow, ValueDecl *MemberDecl, |
3225 | QualType T, ExprValueKind VK, |
3226 | ExprObjectKind OK) { |
3227 | return Create(C, Base, IsArrow, SourceLocation(), NestedNameSpecifierLoc(), |
3228 | SourceLocation(), MemberDecl, |
3229 | DeclAccessPair::make(MemberDecl, MemberDecl->getAccess()), |
3230 | DeclarationNameInfo(), nullptr, T, VK, OK, NOUR_None); |
3231 | } |
3232 | |
3233 | static MemberExpr *CreateEmpty(const ASTContext &Context, bool HasQualifier, |
3234 | bool HasFoundDecl, |
3235 | bool HasTemplateKWAndArgsInfo, |
3236 | unsigned NumTemplateArgs); |
3237 | |
3238 | void setBase(Expr *E) { Base = E; } |
3239 | Expr *getBase() const { return cast<Expr>(Base); } |
3240 | |
3241 | /// Retrieve the member declaration to which this expression refers. |
3242 | /// |
3243 | /// The returned declaration will be a FieldDecl or (in C++) a VarDecl (for |
3244 | /// static data members), a CXXMethodDecl, or an EnumConstantDecl. |
3245 | ValueDecl *getMemberDecl() const { return MemberDecl; } |
3246 | void setMemberDecl(ValueDecl *D); |
3247 | |
3248 | /// Retrieves the declaration found by lookup. |
3249 | DeclAccessPair getFoundDecl() const { |
3250 | if (!hasQualifierOrFoundDecl()) |
3251 | return DeclAccessPair::make(getMemberDecl(), |
3252 | getMemberDecl()->getAccess()); |
3253 | return getTrailingObjects<MemberExprNameQualifier>()->FoundDecl; |
3254 | } |
3255 | |
3256 | /// Determines whether this member expression actually had |
3257 | /// a C++ nested-name-specifier prior to the name of the member, e.g., |
3258 | /// x->Base::foo. |
3259 | bool hasQualifier() const { return getQualifier() != nullptr; } |
3260 | |
3261 | /// If the member name was qualified, retrieves the |
3262 | /// nested-name-specifier that precedes the member name, with source-location |
3263 | /// information. |
3264 | NestedNameSpecifierLoc getQualifierLoc() const { |
3265 | if (!hasQualifierOrFoundDecl()) |
3266 | return NestedNameSpecifierLoc(); |
3267 | return getTrailingObjects<MemberExprNameQualifier>()->QualifierLoc; |
3268 | } |
3269 | |
3270 | /// If the member name was qualified, retrieves the |
3271 | /// nested-name-specifier that precedes the member name. Otherwise, returns |
3272 | /// NULL. |
3273 | NestedNameSpecifier *getQualifier() const { |
3274 | return getQualifierLoc().getNestedNameSpecifier(); |
3275 | } |
3276 | |
3277 | /// Retrieve the location of the template keyword preceding |
3278 | /// the member name, if any. |
3279 | SourceLocation getTemplateKeywordLoc() const { |
3280 | if (!hasTemplateKWAndArgsInfo()) |
3281 | return SourceLocation(); |
3282 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->TemplateKWLoc; |
3283 | } |
3284 | |
3285 | /// Retrieve the location of the left angle bracket starting the |
3286 | /// explicit template argument list following the member name, if any. |
3287 | SourceLocation getLAngleLoc() const { |
3288 | if (!hasTemplateKWAndArgsInfo()) |
3289 | return SourceLocation(); |
3290 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->LAngleLoc; |
3291 | } |
3292 | |
3293 | /// Retrieve the location of the right angle bracket ending the |
3294 | /// explicit template argument list following the member name, if any. |
3295 | SourceLocation getRAngleLoc() const { |
3296 | if (!hasTemplateKWAndArgsInfo()) |
3297 | return SourceLocation(); |
3298 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->RAngleLoc; |
3299 | } |
3300 | |
3301 | /// Determines whether the member name was preceded by the template keyword. |
3302 | bool hasTemplateKeyword() const { return getTemplateKeywordLoc().isValid(); } |
3303 | |
3304 | /// Determines whether the member name was followed by an |
3305 | /// explicit template argument list. |
3306 | bool hasExplicitTemplateArgs() const { return getLAngleLoc().isValid(); } |
3307 | |
3308 | /// Copies the template arguments (if present) into the given |
3309 | /// structure. |
3310 | void copyTemplateArgumentsInto(TemplateArgumentListInfo &List) const { |
3311 | if (hasExplicitTemplateArgs()) |
3312 | getTrailingObjects<ASTTemplateKWAndArgsInfo>()->copyInto( |
3313 | getTrailingObjects<TemplateArgumentLoc>(), List); |
3314 | } |
3315 | |
3316 | /// Retrieve the template arguments provided as part of this |
3317 | /// template-id. |
3318 | const TemplateArgumentLoc *getTemplateArgs() const { |
3319 | if (!hasExplicitTemplateArgs()) |
3320 | return nullptr; |
3321 | |
3322 | return getTrailingObjects<TemplateArgumentLoc>(); |
3323 | } |
3324 | |
3325 | /// Retrieve the number of template arguments provided as part of this |
3326 | /// template-id. |
3327 | unsigned getNumTemplateArgs() const { |
3328 | if (!hasExplicitTemplateArgs()) |
3329 | return 0; |
3330 | |
3331 | return getTrailingObjects<ASTTemplateKWAndArgsInfo>()->NumTemplateArgs; |
3332 | } |
3333 | |
3334 | ArrayRef<TemplateArgumentLoc> template_arguments() const { |
3335 | return {getTemplateArgs(), getNumTemplateArgs()}; |
3336 | } |
3337 | |
3338 | /// Retrieve the member declaration name info. |
3339 | DeclarationNameInfo getMemberNameInfo() const { |
3340 | return DeclarationNameInfo(MemberDecl->getDeclName(), |
3341 | MemberLoc, MemberDNLoc); |
3342 | } |
3343 | |
3344 | SourceLocation getOperatorLoc() const { return MemberExprBits.OperatorLoc; } |
3345 | |
3346 | bool isArrow() const { return MemberExprBits.IsArrow; } |
3347 | void setArrow(bool A) { MemberExprBits.IsArrow = A; } |
3348 | |
3349 | /// getMemberLoc - Return the location of the "member", in X->F, it is the |
3350 | /// location of 'F'. |
3351 | SourceLocation getMemberLoc() const { return MemberLoc; } |
3352 | void setMemberLoc(SourceLocation L) { MemberLoc = L; } |
3353 | |
3354 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)); |
3355 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)); |
3356 | |
3357 | SourceLocation getExprLoc() const LLVM_READONLY__attribute__((__pure__)) { return MemberLoc; } |
3358 | |
3359 | /// Determine whether the base of this explicit is implicit. |
3360 | bool isImplicitAccess() const { |
3361 | return getBase() && getBase()->isImplicitCXXThis(); |
3362 | } |
3363 | |
3364 | /// Returns true if this member expression refers to a method that |
3365 | /// was resolved from an overloaded set having size greater than 1. |
3366 | bool hadMultipleCandidates() const { |
3367 | return MemberExprBits.HadMultipleCandidates; |
3368 | } |
3369 | /// Sets the flag telling whether this expression refers to |
3370 | /// a method that was resolved from an overloaded set having size |
3371 | /// greater than 1. |
3372 | void setHadMultipleCandidates(bool V = true) { |
3373 | MemberExprBits.HadMultipleCandidates = V; |
3374 | } |
3375 | |
3376 | /// Returns true if virtual dispatch is performed. |
3377 | /// If the member access is fully qualified, (i.e. X::f()), virtual |
3378 | /// dispatching is not performed. In -fapple-kext mode qualified |
3379 | /// calls to virtual method will still go through the vtable. |
3380 | bool performsVirtualDispatch(const LangOptions &LO) const { |
3381 | return LO.AppleKext || !hasQualifier(); |
3382 | } |
3383 | |
3384 | /// Is this expression a non-odr-use reference, and if so, why? |
3385 | /// This is only meaningful if the named member is a static member. |
3386 | NonOdrUseReason isNonOdrUse() const { |
3387 | return static_cast<NonOdrUseReason>(MemberExprBits.NonOdrUseReason); |
3388 | } |
3389 | |
3390 | static bool classof(const Stmt *T) { |
3391 | return T->getStmtClass() == MemberExprClass; |
3392 | } |
3393 | |
3394 | // Iterators |
3395 | child_range children() { return child_range(&Base, &Base+1); } |
3396 | const_child_range children() const { |
3397 | return const_child_range(&Base, &Base + 1); |
3398 | } |
3399 | }; |
3400 | |
3401 | /// CompoundLiteralExpr - [C99 6.5.2.5] |
3402 | /// |
3403 | class CompoundLiteralExpr : public Expr { |
3404 | /// LParenLoc - If non-null, this is the location of the left paren in a |
3405 | /// compound literal like "(int){4}". This can be null if this is a |
3406 | /// synthesized compound expression. |
3407 | SourceLocation LParenLoc; |
3408 | |
3409 | /// The type as written. This can be an incomplete array type, in |
3410 | /// which case the actual expression type will be different. |
3411 | /// The int part of the pair stores whether this expr is file scope. |
3412 | llvm::PointerIntPair<TypeSourceInfo *, 1, bool> TInfoAndScope; |
3413 | Stmt *Init; |
3414 | public: |
3415 | CompoundLiteralExpr(SourceLocation lparenloc, TypeSourceInfo *tinfo, |
3416 | QualType T, ExprValueKind VK, Expr *init, bool fileScope) |
3417 | : Expr(CompoundLiteralExprClass, T, VK, OK_Ordinary), |
3418 | LParenLoc(lparenloc), TInfoAndScope(tinfo, fileScope), Init(init) { |
3419 | setDependence(computeDependence(this)); |
3420 | } |
3421 | |
3422 | /// Construct an empty compound literal. |
3423 | explicit CompoundLiteralExpr(EmptyShell Empty) |
3424 | : Expr(CompoundLiteralExprClass, Empty) { } |
3425 | |
3426 | const Expr *getInitializer() const { return cast<Expr>(Init); } |
3427 | Expr *getInitializer() { return cast<Expr>(Init); } |
3428 | void setInitializer(Expr *E) { Init = E; } |
3429 | |
3430 | bool isFileScope() const { return TInfoAndScope.getInt(); } |
3431 | void setFileScope(bool FS) { TInfoAndScope.setInt(FS); } |
3432 | |
3433 | SourceLocation getLParenLoc() const { return LParenLoc; } |
3434 | void setLParenLoc(SourceLocation L) { LParenLoc = L; } |
3435 | |
3436 | TypeSourceInfo *getTypeSourceInfo() const { |
3437 | return TInfoAndScope.getPointer(); |
3438 | } |
3439 | void setTypeSourceInfo(TypeSourceInfo *tinfo) { |
3440 | TInfoAndScope.setPointer(tinfo); |
3441 | } |
3442 | |
3443 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
3444 | // FIXME: Init should never be null. |
3445 | if (!Init) |
3446 | return SourceLocation(); |
3447 | if (LParenLoc.isInvalid()) |
3448 | return Init->getBeginLoc(); |
3449 | return LParenLoc; |
3450 | } |
3451 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
3452 | // FIXME: Init should never be null. |
3453 | if (!Init) |
3454 | return SourceLocation(); |
3455 | return Init->getEndLoc(); |
3456 | } |
3457 | |
3458 | static bool classof(const Stmt *T) { |
3459 | return T->getStmtClass() == CompoundLiteralExprClass; |
3460 | } |
3461 | |
3462 | // Iterators |
3463 | child_range children() { return child_range(&Init, &Init+1); } |
3464 | const_child_range children() const { |
3465 | return const_child_range(&Init, &Init + 1); |
3466 | } |
3467 | }; |
3468 | |
3469 | /// CastExpr - Base class for type casts, including both implicit |
3470 | /// casts (ImplicitCastExpr) and explicit casts that have some |
3471 | /// representation in the source code (ExplicitCastExpr's derived |
3472 | /// classes). |
3473 | class CastExpr : public Expr { |
3474 | Stmt *Op; |
3475 | |
3476 | bool CastConsistency() const; |
3477 | |
3478 | const CXXBaseSpecifier * const *path_buffer() const { |
3479 | return const_cast<CastExpr*>(this)->path_buffer(); |
3480 | } |
3481 | CXXBaseSpecifier **path_buffer(); |
3482 | |
3483 | friend class ASTStmtReader; |
3484 | |
3485 | protected: |
3486 | CastExpr(StmtClass SC, QualType ty, ExprValueKind VK, const CastKind kind, |
3487 | Expr *op, unsigned BasePathSize, bool HasFPFeatures) |
3488 | : Expr(SC, ty, VK, OK_Ordinary), Op(op) { |
3489 | CastExprBits.Kind = kind; |
3490 | CastExprBits.PartOfExplicitCast = false; |
3491 | CastExprBits.BasePathSize = BasePathSize; |
3492 | assert((CastExprBits.BasePathSize == BasePathSize) &&(static_cast <bool> ((CastExprBits.BasePathSize == BasePathSize ) && "BasePathSize overflow!") ? void (0) : __assert_fail ("(CastExprBits.BasePathSize == BasePathSize) && \"BasePathSize overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3493, __extension__ __PRETTY_FUNCTION__)) |
3493 | "BasePathSize overflow!")(static_cast <bool> ((CastExprBits.BasePathSize == BasePathSize ) && "BasePathSize overflow!") ? void (0) : __assert_fail ("(CastExprBits.BasePathSize == BasePathSize) && \"BasePathSize overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3493, __extension__ __PRETTY_FUNCTION__)); |
3494 | setDependence(computeDependence(this)); |
3495 | assert(CastConsistency())(static_cast <bool> (CastConsistency()) ? void (0) : __assert_fail ("CastConsistency()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3495, __extension__ __PRETTY_FUNCTION__)); |
3496 | CastExprBits.HasFPFeatures = HasFPFeatures; |
3497 | } |
3498 | |
3499 | /// Construct an empty cast. |
3500 | CastExpr(StmtClass SC, EmptyShell Empty, unsigned BasePathSize, |
3501 | bool HasFPFeatures) |
3502 | : Expr(SC, Empty) { |
3503 | CastExprBits.PartOfExplicitCast = false; |
3504 | CastExprBits.BasePathSize = BasePathSize; |
3505 | CastExprBits.HasFPFeatures = HasFPFeatures; |
3506 | assert((CastExprBits.BasePathSize == BasePathSize) &&(static_cast <bool> ((CastExprBits.BasePathSize == BasePathSize ) && "BasePathSize overflow!") ? void (0) : __assert_fail ("(CastExprBits.BasePathSize == BasePathSize) && \"BasePathSize overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3507, __extension__ __PRETTY_FUNCTION__)) |
3507 | "BasePathSize overflow!")(static_cast <bool> ((CastExprBits.BasePathSize == BasePathSize ) && "BasePathSize overflow!") ? void (0) : __assert_fail ("(CastExprBits.BasePathSize == BasePathSize) && \"BasePathSize overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3507, __extension__ __PRETTY_FUNCTION__)); |
3508 | } |
3509 | |
3510 | /// Return a pointer to the trailing FPOptions. |
3511 | /// \pre hasStoredFPFeatures() == true |
3512 | FPOptionsOverride *getTrailingFPFeatures(); |
3513 | const FPOptionsOverride *getTrailingFPFeatures() const { |
3514 | return const_cast<CastExpr *>(this)->getTrailingFPFeatures(); |
3515 | } |
3516 | |
3517 | public: |
3518 | CastKind getCastKind() const { return (CastKind) CastExprBits.Kind; } |
3519 | void setCastKind(CastKind K) { CastExprBits.Kind = K; } |
3520 | |
3521 | static const char *getCastKindName(CastKind CK); |
3522 | const char *getCastKindName() const { return getCastKindName(getCastKind()); } |
3523 | |
3524 | Expr *getSubExpr() { return cast<Expr>(Op); } |
3525 | const Expr *getSubExpr() const { return cast<Expr>(Op); } |
3526 | void setSubExpr(Expr *E) { Op = E; } |
3527 | |
3528 | /// Retrieve the cast subexpression as it was written in the source |
3529 | /// code, looking through any implicit casts or other intermediate nodes |
3530 | /// introduced by semantic analysis. |
3531 | Expr *getSubExprAsWritten(); |
3532 | const Expr *getSubExprAsWritten() const { |
3533 | return const_cast<CastExpr *>(this)->getSubExprAsWritten(); |
3534 | } |
3535 | |
3536 | /// If this cast applies a user-defined conversion, retrieve the conversion |
3537 | /// function that it invokes. |
3538 | NamedDecl *getConversionFunction() const; |
3539 | |
3540 | typedef CXXBaseSpecifier **path_iterator; |
3541 | typedef const CXXBaseSpecifier *const *path_const_iterator; |
3542 | bool path_empty() const { return path_size() == 0; } |
3543 | unsigned path_size() const { return CastExprBits.BasePathSize; } |
3544 | path_iterator path_begin() { return path_buffer(); } |
3545 | path_iterator path_end() { return path_buffer() + path_size(); } |
3546 | path_const_iterator path_begin() const { return path_buffer(); } |
3547 | path_const_iterator path_end() const { return path_buffer() + path_size(); } |
3548 | |
3549 | llvm::iterator_range<path_iterator> path() { |
3550 | return llvm::make_range(path_begin(), path_end()); |
3551 | } |
3552 | llvm::iterator_range<path_const_iterator> path() const { |
3553 | return llvm::make_range(path_begin(), path_end()); |
3554 | } |
3555 | |
3556 | const FieldDecl *getTargetUnionField() const { |
3557 | assert(getCastKind() == CK_ToUnion)(static_cast <bool> (getCastKind() == CK_ToUnion) ? void (0) : __assert_fail ("getCastKind() == CK_ToUnion", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3557, __extension__ __PRETTY_FUNCTION__)); |
3558 | return getTargetFieldForToUnionCast(getType(), getSubExpr()->getType()); |
3559 | } |
3560 | |
3561 | bool hasStoredFPFeatures() const { return CastExprBits.HasFPFeatures; } |
3562 | |
3563 | /// Get FPOptionsOverride from trailing storage. |
3564 | FPOptionsOverride getStoredFPFeatures() const { |
3565 | assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) : __assert_fail ("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3565, __extension__ __PRETTY_FUNCTION__)); |
3566 | return *getTrailingFPFeatures(); |
3567 | } |
3568 | |
3569 | // Get the FP features status of this operation. Only meaningful for |
3570 | // operations on floating point types. |
3571 | FPOptions getFPFeaturesInEffect(const LangOptions &LO) const { |
3572 | if (hasStoredFPFeatures()) |
3573 | return getStoredFPFeatures().applyOverrides(LO); |
3574 | return FPOptions::defaultWithoutTrailingStorage(LO); |
3575 | } |
3576 | |
3577 | FPOptionsOverride getFPFeatures() const { |
3578 | if (hasStoredFPFeatures()) |
3579 | return getStoredFPFeatures(); |
3580 | return FPOptionsOverride(); |
3581 | } |
3582 | |
3583 | static const FieldDecl *getTargetFieldForToUnionCast(QualType unionType, |
3584 | QualType opType); |
3585 | static const FieldDecl *getTargetFieldForToUnionCast(const RecordDecl *RD, |
3586 | QualType opType); |
3587 | |
3588 | static bool classof(const Stmt *T) { |
3589 | return T->getStmtClass() >= firstCastExprConstant && |
3590 | T->getStmtClass() <= lastCastExprConstant; |
3591 | } |
3592 | |
3593 | // Iterators |
3594 | child_range children() { return child_range(&Op, &Op+1); } |
3595 | const_child_range children() const { return const_child_range(&Op, &Op + 1); } |
3596 | }; |
3597 | |
3598 | /// ImplicitCastExpr - Allows us to explicitly represent implicit type |
3599 | /// conversions, which have no direct representation in the original |
3600 | /// source code. For example: converting T[]->T*, void f()->void |
3601 | /// (*f)(), float->double, short->int, etc. |
3602 | /// |
3603 | /// In C, implicit casts always produce rvalues. However, in C++, an |
3604 | /// implicit cast whose result is being bound to a reference will be |
3605 | /// an lvalue or xvalue. For example: |
3606 | /// |
3607 | /// @code |
3608 | /// class Base { }; |
3609 | /// class Derived : public Base { }; |
3610 | /// Derived &&ref(); |
3611 | /// void f(Derived d) { |
3612 | /// Base& b = d; // initializer is an ImplicitCastExpr |
3613 | /// // to an lvalue of type Base |
3614 | /// Base&& r = ref(); // initializer is an ImplicitCastExpr |
3615 | /// // to an xvalue of type Base |
3616 | /// } |
3617 | /// @endcode |
3618 | class ImplicitCastExpr final |
3619 | : public CastExpr, |
3620 | private llvm::TrailingObjects<ImplicitCastExpr, CXXBaseSpecifier *, |
3621 | FPOptionsOverride> { |
3622 | |
3623 | ImplicitCastExpr(QualType ty, CastKind kind, Expr *op, |
3624 | unsigned BasePathLength, FPOptionsOverride FPO, |
3625 | ExprValueKind VK) |
3626 | : CastExpr(ImplicitCastExprClass, ty, VK, kind, op, BasePathLength, |
3627 | FPO.requiresTrailingStorage()) { |
3628 | if (hasStoredFPFeatures()) |
3629 | *getTrailingFPFeatures() = FPO; |
3630 | } |
3631 | |
3632 | /// Construct an empty implicit cast. |
3633 | explicit ImplicitCastExpr(EmptyShell Shell, unsigned PathSize, |
3634 | bool HasFPFeatures) |
3635 | : CastExpr(ImplicitCastExprClass, Shell, PathSize, HasFPFeatures) {} |
3636 | |
3637 | unsigned numTrailingObjects(OverloadToken<CXXBaseSpecifier *>) const { |
3638 | return path_size(); |
3639 | } |
3640 | |
3641 | public: |
3642 | enum OnStack_t { OnStack }; |
3643 | ImplicitCastExpr(OnStack_t _, QualType ty, CastKind kind, Expr *op, |
3644 | ExprValueKind VK, FPOptionsOverride FPO) |
3645 | : CastExpr(ImplicitCastExprClass, ty, VK, kind, op, 0, |
3646 | FPO.requiresTrailingStorage()) { |
3647 | if (hasStoredFPFeatures()) |
3648 | *getTrailingFPFeatures() = FPO; |
3649 | } |
3650 | |
3651 | bool isPartOfExplicitCast() const { return CastExprBits.PartOfExplicitCast; } |
3652 | void setIsPartOfExplicitCast(bool PartOfExplicitCast) { |
3653 | CastExprBits.PartOfExplicitCast = PartOfExplicitCast; |
3654 | } |
3655 | |
3656 | static ImplicitCastExpr *Create(const ASTContext &Context, QualType T, |
3657 | CastKind Kind, Expr *Operand, |
3658 | const CXXCastPath *BasePath, |
3659 | ExprValueKind Cat, FPOptionsOverride FPO); |
3660 | |
3661 | static ImplicitCastExpr *CreateEmpty(const ASTContext &Context, |
3662 | unsigned PathSize, bool HasFPFeatures); |
3663 | |
3664 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
3665 | return getSubExpr()->getBeginLoc(); |
3666 | } |
3667 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
3668 | return getSubExpr()->getEndLoc(); |
3669 | } |
3670 | |
3671 | static bool classof(const Stmt *T) { |
3672 | return T->getStmtClass() == ImplicitCastExprClass; |
3673 | } |
3674 | |
3675 | friend TrailingObjects; |
3676 | friend class CastExpr; |
3677 | }; |
3678 | |
3679 | /// ExplicitCastExpr - An explicit cast written in the source |
3680 | /// code. |
3681 | /// |
3682 | /// This class is effectively an abstract class, because it provides |
3683 | /// the basic representation of an explicitly-written cast without |
3684 | /// specifying which kind of cast (C cast, functional cast, static |
3685 | /// cast, etc.) was written; specific derived classes represent the |
3686 | /// particular style of cast and its location information. |
3687 | /// |
3688 | /// Unlike implicit casts, explicit cast nodes have two different |
3689 | /// types: the type that was written into the source code, and the |
3690 | /// actual type of the expression as determined by semantic |
3691 | /// analysis. These types may differ slightly. For example, in C++ one |
3692 | /// can cast to a reference type, which indicates that the resulting |
3693 | /// expression will be an lvalue or xvalue. The reference type, however, |
3694 | /// will not be used as the type of the expression. |
3695 | class ExplicitCastExpr : public CastExpr { |
3696 | /// TInfo - Source type info for the (written) type |
3697 | /// this expression is casting to. |
3698 | TypeSourceInfo *TInfo; |
3699 | |
3700 | protected: |
3701 | ExplicitCastExpr(StmtClass SC, QualType exprTy, ExprValueKind VK, |
3702 | CastKind kind, Expr *op, unsigned PathSize, |
3703 | bool HasFPFeatures, TypeSourceInfo *writtenTy) |
3704 | : CastExpr(SC, exprTy, VK, kind, op, PathSize, HasFPFeatures), |
3705 | TInfo(writtenTy) {} |
3706 | |
3707 | /// Construct an empty explicit cast. |
3708 | ExplicitCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize, |
3709 | bool HasFPFeatures) |
3710 | : CastExpr(SC, Shell, PathSize, HasFPFeatures) {} |
3711 | |
3712 | public: |
3713 | /// getTypeInfoAsWritten - Returns the type source info for the type |
3714 | /// that this expression is casting to. |
3715 | TypeSourceInfo *getTypeInfoAsWritten() const { return TInfo; } |
3716 | void setTypeInfoAsWritten(TypeSourceInfo *writtenTy) { TInfo = writtenTy; } |
3717 | |
3718 | /// getTypeAsWritten - Returns the type that this expression is |
3719 | /// casting to, as written in the source code. |
3720 | QualType getTypeAsWritten() const { return TInfo->getType(); } |
3721 | |
3722 | static bool classof(const Stmt *T) { |
3723 | return T->getStmtClass() >= firstExplicitCastExprConstant && |
3724 | T->getStmtClass() <= lastExplicitCastExprConstant; |
3725 | } |
3726 | }; |
3727 | |
3728 | /// CStyleCastExpr - An explicit cast in C (C99 6.5.4) or a C-style |
3729 | /// cast in C++ (C++ [expr.cast]), which uses the syntax |
3730 | /// (Type)expr. For example: @c (int)f. |
3731 | class CStyleCastExpr final |
3732 | : public ExplicitCastExpr, |
3733 | private llvm::TrailingObjects<CStyleCastExpr, CXXBaseSpecifier *, |
3734 | FPOptionsOverride> { |
3735 | SourceLocation LPLoc; // the location of the left paren |
3736 | SourceLocation RPLoc; // the location of the right paren |
3737 | |
3738 | CStyleCastExpr(QualType exprTy, ExprValueKind vk, CastKind kind, Expr *op, |
3739 | unsigned PathSize, FPOptionsOverride FPO, |
3740 | TypeSourceInfo *writtenTy, SourceLocation l, SourceLocation r) |
3741 | : ExplicitCastExpr(CStyleCastExprClass, exprTy, vk, kind, op, PathSize, |
3742 | FPO.requiresTrailingStorage(), writtenTy), |
3743 | LPLoc(l), RPLoc(r) { |
3744 | if (hasStoredFPFeatures()) |
3745 | *getTrailingFPFeatures() = FPO; |
3746 | } |
3747 | |
3748 | /// Construct an empty C-style explicit cast. |
3749 | explicit CStyleCastExpr(EmptyShell Shell, unsigned PathSize, |
3750 | bool HasFPFeatures) |
3751 | : ExplicitCastExpr(CStyleCastExprClass, Shell, PathSize, HasFPFeatures) {} |
3752 | |
3753 | unsigned numTrailingObjects(OverloadToken<CXXBaseSpecifier *>) const { |
3754 | return path_size(); |
3755 | } |
3756 | |
3757 | public: |
3758 | static CStyleCastExpr * |
3759 | Create(const ASTContext &Context, QualType T, ExprValueKind VK, CastKind K, |
3760 | Expr *Op, const CXXCastPath *BasePath, FPOptionsOverride FPO, |
3761 | TypeSourceInfo *WrittenTy, SourceLocation L, SourceLocation R); |
3762 | |
3763 | static CStyleCastExpr *CreateEmpty(const ASTContext &Context, |
3764 | unsigned PathSize, bool HasFPFeatures); |
3765 | |
3766 | SourceLocation getLParenLoc() const { return LPLoc; } |
3767 | void setLParenLoc(SourceLocation L) { LPLoc = L; } |
3768 | |
3769 | SourceLocation getRParenLoc() const { return RPLoc; } |
3770 | void setRParenLoc(SourceLocation L) { RPLoc = L; } |
3771 | |
3772 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return LPLoc; } |
3773 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
3774 | return getSubExpr()->getEndLoc(); |
3775 | } |
3776 | |
3777 | static bool classof(const Stmt *T) { |
3778 | return T->getStmtClass() == CStyleCastExprClass; |
3779 | } |
3780 | |
3781 | friend TrailingObjects; |
3782 | friend class CastExpr; |
3783 | }; |
3784 | |
3785 | /// A builtin binary operation expression such as "x + y" or "x <= y". |
3786 | /// |
3787 | /// This expression node kind describes a builtin binary operation, |
3788 | /// such as "x + y" for integer values "x" and "y". The operands will |
3789 | /// already have been converted to appropriate types (e.g., by |
3790 | /// performing promotions or conversions). |
3791 | /// |
3792 | /// In C++, where operators may be overloaded, a different kind of |
3793 | /// expression node (CXXOperatorCallExpr) is used to express the |
3794 | /// invocation of an overloaded operator with operator syntax. Within |
3795 | /// a C++ template, whether BinaryOperator or CXXOperatorCallExpr is |
3796 | /// used to store an expression "x + y" depends on the subexpressions |
3797 | /// for x and y. If neither x or y is type-dependent, and the "+" |
3798 | /// operator resolves to a built-in operation, BinaryOperator will be |
3799 | /// used to express the computation (x and y may still be |
3800 | /// value-dependent). If either x or y is type-dependent, or if the |
3801 | /// "+" resolves to an overloaded operator, CXXOperatorCallExpr will |
3802 | /// be used to express the computation. |
3803 | class BinaryOperator : public Expr { |
3804 | enum { LHS, RHS, END_EXPR }; |
3805 | Stmt *SubExprs[END_EXPR]; |
3806 | |
3807 | public: |
3808 | typedef BinaryOperatorKind Opcode; |
3809 | |
3810 | protected: |
3811 | size_t offsetOfTrailingStorage() const; |
3812 | |
3813 | /// Return a pointer to the trailing FPOptions |
3814 | FPOptionsOverride *getTrailingFPFeatures() { |
3815 | assert(BinaryOperatorBits.HasFPFeatures)(static_cast <bool> (BinaryOperatorBits.HasFPFeatures) ? void (0) : __assert_fail ("BinaryOperatorBits.HasFPFeatures" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3815, __extension__ __PRETTY_FUNCTION__)); |
3816 | return reinterpret_cast<FPOptionsOverride *>( |
3817 | reinterpret_cast<char *>(this) + offsetOfTrailingStorage()); |
3818 | } |
3819 | const FPOptionsOverride *getTrailingFPFeatures() const { |
3820 | assert(BinaryOperatorBits.HasFPFeatures)(static_cast <bool> (BinaryOperatorBits.HasFPFeatures) ? void (0) : __assert_fail ("BinaryOperatorBits.HasFPFeatures" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3820, __extension__ __PRETTY_FUNCTION__)); |
3821 | return reinterpret_cast<const FPOptionsOverride *>( |
3822 | reinterpret_cast<const char *>(this) + offsetOfTrailingStorage()); |
3823 | } |
3824 | |
3825 | /// Build a binary operator, assuming that appropriate storage has been |
3826 | /// allocated for the trailing objects when needed. |
3827 | BinaryOperator(const ASTContext &Ctx, Expr *lhs, Expr *rhs, Opcode opc, |
3828 | QualType ResTy, ExprValueKind VK, ExprObjectKind OK, |
3829 | SourceLocation opLoc, FPOptionsOverride FPFeatures); |
3830 | |
3831 | /// Construct an empty binary operator. |
3832 | explicit BinaryOperator(EmptyShell Empty) : Expr(BinaryOperatorClass, Empty) { |
3833 | BinaryOperatorBits.Opc = BO_Comma; |
3834 | } |
3835 | |
3836 | public: |
3837 | static BinaryOperator *CreateEmpty(const ASTContext &C, bool hasFPFeatures); |
3838 | |
3839 | static BinaryOperator *Create(const ASTContext &C, Expr *lhs, Expr *rhs, |
3840 | Opcode opc, QualType ResTy, ExprValueKind VK, |
3841 | ExprObjectKind OK, SourceLocation opLoc, |
3842 | FPOptionsOverride FPFeatures); |
3843 | SourceLocation getExprLoc() const { return getOperatorLoc(); } |
3844 | SourceLocation getOperatorLoc() const { return BinaryOperatorBits.OpLoc; } |
3845 | void setOperatorLoc(SourceLocation L) { BinaryOperatorBits.OpLoc = L; } |
3846 | |
3847 | Opcode getOpcode() const { |
3848 | return static_cast<Opcode>(BinaryOperatorBits.Opc); |
3849 | } |
3850 | void setOpcode(Opcode Opc) { BinaryOperatorBits.Opc = Opc; } |
3851 | |
3852 | Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
3853 | void setLHS(Expr *E) { SubExprs[LHS] = E; } |
3854 | Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
3855 | void setRHS(Expr *E) { SubExprs[RHS] = E; } |
3856 | |
3857 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
3858 | return getLHS()->getBeginLoc(); |
3859 | } |
3860 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
3861 | return getRHS()->getEndLoc(); |
3862 | } |
3863 | |
3864 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
3865 | /// corresponds to, e.g. "<<=". |
3866 | static StringRef getOpcodeStr(Opcode Op); |
3867 | |
3868 | StringRef getOpcodeStr() const { return getOpcodeStr(getOpcode()); } |
3869 | |
3870 | /// Retrieve the binary opcode that corresponds to the given |
3871 | /// overloaded operator. |
3872 | static Opcode getOverloadedOpcode(OverloadedOperatorKind OO); |
3873 | |
3874 | /// Retrieve the overloaded operator kind that corresponds to |
3875 | /// the given binary opcode. |
3876 | static OverloadedOperatorKind getOverloadedOperator(Opcode Opc); |
3877 | |
3878 | /// predicates to categorize the respective opcodes. |
3879 | static bool isPtrMemOp(Opcode Opc) { |
3880 | return Opc == BO_PtrMemD || Opc == BO_PtrMemI; |
3881 | } |
3882 | bool isPtrMemOp() const { return isPtrMemOp(getOpcode()); } |
3883 | |
3884 | static bool isMultiplicativeOp(Opcode Opc) { |
3885 | return Opc >= BO_Mul && Opc <= BO_Rem; |
3886 | } |
3887 | bool isMultiplicativeOp() const { return isMultiplicativeOp(getOpcode()); } |
3888 | static bool isAdditiveOp(Opcode Opc) { return Opc == BO_Add || Opc==BO_Sub; } |
3889 | bool isAdditiveOp() const { return isAdditiveOp(getOpcode()); } |
3890 | static bool isShiftOp(Opcode Opc) { return Opc == BO_Shl || Opc == BO_Shr; } |
3891 | bool isShiftOp() const { return isShiftOp(getOpcode()); } |
3892 | |
3893 | static bool isBitwiseOp(Opcode Opc) { return Opc >= BO_And && Opc <= BO_Or; } |
3894 | bool isBitwiseOp() const { return isBitwiseOp(getOpcode()); } |
3895 | |
3896 | static bool isRelationalOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_GE; } |
3897 | bool isRelationalOp() const { return isRelationalOp(getOpcode()); } |
3898 | |
3899 | static bool isEqualityOp(Opcode Opc) { return Opc == BO_EQ || Opc == BO_NE; } |
3900 | bool isEqualityOp() const { return isEqualityOp(getOpcode()); } |
3901 | |
3902 | static bool isComparisonOp(Opcode Opc) { return Opc >= BO_Cmp && Opc<=BO_NE; } |
3903 | bool isComparisonOp() const { return isComparisonOp(getOpcode()); } |
3904 | |
3905 | static bool isCommaOp(Opcode Opc) { return Opc == BO_Comma; } |
3906 | bool isCommaOp() const { return isCommaOp(getOpcode()); } |
3907 | |
3908 | static Opcode negateComparisonOp(Opcode Opc) { |
3909 | switch (Opc) { |
3910 | default: |
3911 | llvm_unreachable("Not a comparison operator.")::llvm::llvm_unreachable_internal("Not a comparison operator." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3911); |
3912 | case BO_LT: return BO_GE; |
3913 | case BO_GT: return BO_LE; |
3914 | case BO_LE: return BO_GT; |
3915 | case BO_GE: return BO_LT; |
3916 | case BO_EQ: return BO_NE; |
3917 | case BO_NE: return BO_EQ; |
3918 | } |
3919 | } |
3920 | |
3921 | static Opcode reverseComparisonOp(Opcode Opc) { |
3922 | switch (Opc) { |
3923 | default: |
3924 | llvm_unreachable("Not a comparison operator.")::llvm::llvm_unreachable_internal("Not a comparison operator." , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3924); |
3925 | case BO_LT: return BO_GT; |
3926 | case BO_GT: return BO_LT; |
3927 | case BO_LE: return BO_GE; |
3928 | case BO_GE: return BO_LE; |
3929 | case BO_EQ: |
3930 | case BO_NE: |
3931 | return Opc; |
3932 | } |
3933 | } |
3934 | |
3935 | static bool isLogicalOp(Opcode Opc) { return Opc == BO_LAnd || Opc==BO_LOr; } |
3936 | bool isLogicalOp() const { return isLogicalOp(getOpcode()); } |
3937 | |
3938 | static bool isAssignmentOp(Opcode Opc) { |
3939 | return Opc >= BO_Assign && Opc <= BO_OrAssign; |
3940 | } |
3941 | bool isAssignmentOp() const { return isAssignmentOp(getOpcode()); } |
3942 | |
3943 | static bool isCompoundAssignmentOp(Opcode Opc) { |
3944 | return Opc > BO_Assign && Opc <= BO_OrAssign; |
3945 | } |
3946 | bool isCompoundAssignmentOp() const { |
3947 | return isCompoundAssignmentOp(getOpcode()); |
3948 | } |
3949 | static Opcode getOpForCompoundAssignment(Opcode Opc) { |
3950 | assert(isCompoundAssignmentOp(Opc))(static_cast <bool> (isCompoundAssignmentOp(Opc)) ? void (0) : __assert_fail ("isCompoundAssignmentOp(Opc)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3950, __extension__ __PRETTY_FUNCTION__)); |
3951 | if (Opc >= BO_AndAssign) |
3952 | return Opcode(unsigned(Opc) - BO_AndAssign + BO_And); |
3953 | else |
3954 | return Opcode(unsigned(Opc) - BO_MulAssign + BO_Mul); |
3955 | } |
3956 | |
3957 | static bool isShiftAssignOp(Opcode Opc) { |
3958 | return Opc == BO_ShlAssign || Opc == BO_ShrAssign; |
3959 | } |
3960 | bool isShiftAssignOp() const { |
3961 | return isShiftAssignOp(getOpcode()); |
3962 | } |
3963 | |
3964 | // Return true if a binary operator using the specified opcode and operands |
3965 | // would match the 'p = (i8*)nullptr + n' idiom for casting a pointer-sized |
3966 | // integer to a pointer. |
3967 | static bool isNullPointerArithmeticExtension(ASTContext &Ctx, Opcode Opc, |
3968 | Expr *LHS, Expr *RHS); |
3969 | |
3970 | static bool classof(const Stmt *S) { |
3971 | return S->getStmtClass() >= firstBinaryOperatorConstant && |
3972 | S->getStmtClass() <= lastBinaryOperatorConstant; |
3973 | } |
3974 | |
3975 | // Iterators |
3976 | child_range children() { |
3977 | return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); |
3978 | } |
3979 | const_child_range children() const { |
3980 | return const_child_range(&SubExprs[0], &SubExprs[0] + END_EXPR); |
3981 | } |
3982 | |
3983 | /// Set and fetch the bit that shows whether FPFeatures needs to be |
3984 | /// allocated in Trailing Storage |
3985 | void setHasStoredFPFeatures(bool B) { BinaryOperatorBits.HasFPFeatures = B; } |
3986 | bool hasStoredFPFeatures() const { return BinaryOperatorBits.HasFPFeatures; } |
3987 | |
3988 | /// Get FPFeatures from trailing storage |
3989 | FPOptionsOverride getStoredFPFeatures() const { |
3990 | assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) : __assert_fail ("hasStoredFPFeatures()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3990, __extension__ __PRETTY_FUNCTION__)); |
3991 | return *getTrailingFPFeatures(); |
3992 | } |
3993 | /// Set FPFeatures in trailing storage, used only by Serialization |
3994 | void setStoredFPFeatures(FPOptionsOverride F) { |
3995 | assert(BinaryOperatorBits.HasFPFeatures)(static_cast <bool> (BinaryOperatorBits.HasFPFeatures) ? void (0) : __assert_fail ("BinaryOperatorBits.HasFPFeatures" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 3995, __extension__ __PRETTY_FUNCTION__)); |
3996 | *getTrailingFPFeatures() = F; |
3997 | } |
3998 | |
3999 | // Get the FP features status of this operator. Only meaningful for |
4000 | // operations on floating point types. |
4001 | FPOptions getFPFeaturesInEffect(const LangOptions &LO) const { |
4002 | if (BinaryOperatorBits.HasFPFeatures) |
4003 | return getStoredFPFeatures().applyOverrides(LO); |
4004 | return FPOptions::defaultWithoutTrailingStorage(LO); |
4005 | } |
4006 | |
4007 | // This is used in ASTImporter |
4008 | FPOptionsOverride getFPFeatures(const LangOptions &LO) const { |
4009 | if (BinaryOperatorBits.HasFPFeatures) |
4010 | return getStoredFPFeatures(); |
4011 | return FPOptionsOverride(); |
4012 | } |
4013 | |
4014 | // Get the FP contractability status of this operator. Only meaningful for |
4015 | // operations on floating point types. |
4016 | bool isFPContractableWithinStatement(const LangOptions &LO) const { |
4017 | return getFPFeaturesInEffect(LO).allowFPContractWithinStatement(); |
4018 | } |
4019 | |
4020 | // Get the FENV_ACCESS status of this operator. Only meaningful for |
4021 | // operations on floating point types. |
4022 | bool isFEnvAccessOn(const LangOptions &LO) const { |
4023 | return getFPFeaturesInEffect(LO).getAllowFEnvAccess(); |
4024 | } |
4025 | |
4026 | protected: |
4027 | BinaryOperator(const ASTContext &Ctx, Expr *lhs, Expr *rhs, Opcode opc, |
4028 | QualType ResTy, ExprValueKind VK, ExprObjectKind OK, |
4029 | SourceLocation opLoc, FPOptionsOverride FPFeatures, |
4030 | bool dead2); |
4031 | |
4032 | /// Construct an empty BinaryOperator, SC is CompoundAssignOperator. |
4033 | BinaryOperator(StmtClass SC, EmptyShell Empty) : Expr(SC, Empty) { |
4034 | BinaryOperatorBits.Opc = BO_MulAssign; |
4035 | } |
4036 | |
4037 | /// Return the size in bytes needed for the trailing objects. |
4038 | /// Used to allocate the right amount of storage. |
4039 | static unsigned sizeOfTrailingObjects(bool HasFPFeatures) { |
4040 | return HasFPFeatures * sizeof(FPOptionsOverride); |
4041 | } |
4042 | }; |
4043 | |
4044 | /// CompoundAssignOperator - For compound assignments (e.g. +=), we keep |
4045 | /// track of the type the operation is performed in. Due to the semantics of |
4046 | /// these operators, the operands are promoted, the arithmetic performed, an |
4047 | /// implicit conversion back to the result type done, then the assignment takes |
4048 | /// place. This captures the intermediate type which the computation is done |
4049 | /// in. |
4050 | class CompoundAssignOperator : public BinaryOperator { |
4051 | QualType ComputationLHSType; |
4052 | QualType ComputationResultType; |
4053 | |
4054 | /// Construct an empty CompoundAssignOperator. |
4055 | explicit CompoundAssignOperator(const ASTContext &C, EmptyShell Empty, |
4056 | bool hasFPFeatures) |
4057 | : BinaryOperator(CompoundAssignOperatorClass, Empty) {} |
4058 | |
4059 | protected: |
4060 | CompoundAssignOperator(const ASTContext &C, Expr *lhs, Expr *rhs, Opcode opc, |
4061 | QualType ResType, ExprValueKind VK, ExprObjectKind OK, |
4062 | SourceLocation OpLoc, FPOptionsOverride FPFeatures, |
4063 | QualType CompLHSType, QualType CompResultType) |
4064 | : BinaryOperator(C, lhs, rhs, opc, ResType, VK, OK, OpLoc, FPFeatures, |
4065 | true), |
4066 | ComputationLHSType(CompLHSType), ComputationResultType(CompResultType) { |
4067 | assert(isCompoundAssignmentOp() &&(static_cast <bool> (isCompoundAssignmentOp() && "Only should be used for compound assignments") ? void (0) : __assert_fail ("isCompoundAssignmentOp() && \"Only should be used for compound assignments\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4068, __extension__ __PRETTY_FUNCTION__)) |
4068 | "Only should be used for compound assignments")(static_cast <bool> (isCompoundAssignmentOp() && "Only should be used for compound assignments") ? void (0) : __assert_fail ("isCompoundAssignmentOp() && \"Only should be used for compound assignments\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4068, __extension__ __PRETTY_FUNCTION__)); |
4069 | } |
4070 | |
4071 | public: |
4072 | static CompoundAssignOperator *CreateEmpty(const ASTContext &C, |
4073 | bool hasFPFeatures); |
4074 | |
4075 | static CompoundAssignOperator * |
4076 | Create(const ASTContext &C, Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, |
4077 | ExprValueKind VK, ExprObjectKind OK, SourceLocation opLoc, |
4078 | FPOptionsOverride FPFeatures, QualType CompLHSType = QualType(), |
4079 | QualType CompResultType = QualType()); |
4080 | |
4081 | // The two computation types are the type the LHS is converted |
4082 | // to for the computation and the type of the result; the two are |
4083 | // distinct in a few cases (specifically, int+=ptr and ptr-=ptr). |
4084 | QualType getComputationLHSType() const { return ComputationLHSType; } |
4085 | void setComputationLHSType(QualType T) { ComputationLHSType = T; } |
4086 | |
4087 | QualType getComputationResultType() const { return ComputationResultType; } |
4088 | void setComputationResultType(QualType T) { ComputationResultType = T; } |
4089 | |
4090 | static bool classof(const Stmt *S) { |
4091 | return S->getStmtClass() == CompoundAssignOperatorClass; |
4092 | } |
4093 | }; |
4094 | |
4095 | inline size_t BinaryOperator::offsetOfTrailingStorage() const { |
4096 | assert(BinaryOperatorBits.HasFPFeatures)(static_cast <bool> (BinaryOperatorBits.HasFPFeatures) ? void (0) : __assert_fail ("BinaryOperatorBits.HasFPFeatures" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4096, __extension__ __PRETTY_FUNCTION__)); |
4097 | return isa<CompoundAssignOperator>(this) ? sizeof(CompoundAssignOperator) |
4098 | : sizeof(BinaryOperator); |
4099 | } |
4100 | |
4101 | /// AbstractConditionalOperator - An abstract base class for |
4102 | /// ConditionalOperator and BinaryConditionalOperator. |
4103 | class AbstractConditionalOperator : public Expr { |
4104 | SourceLocation QuestionLoc, ColonLoc; |
4105 | friend class ASTStmtReader; |
4106 | |
4107 | protected: |
4108 | AbstractConditionalOperator(StmtClass SC, QualType T, ExprValueKind VK, |
4109 | ExprObjectKind OK, SourceLocation qloc, |
4110 | SourceLocation cloc) |
4111 | : Expr(SC, T, VK, OK), QuestionLoc(qloc), ColonLoc(cloc) {} |
4112 | |
4113 | AbstractConditionalOperator(StmtClass SC, EmptyShell Empty) |
4114 | : Expr(SC, Empty) { } |
4115 | |
4116 | public: |
4117 | // getCond - Return the expression representing the condition for |
4118 | // the ?: operator. |
4119 | Expr *getCond() const; |
4120 | |
4121 | // getTrueExpr - Return the subexpression representing the value of |
4122 | // the expression if the condition evaluates to true. |
4123 | Expr *getTrueExpr() const; |
4124 | |
4125 | // getFalseExpr - Return the subexpression representing the value of |
4126 | // the expression if the condition evaluates to false. This is |
4127 | // the same as getRHS. |
4128 | Expr *getFalseExpr() const; |
4129 | |
4130 | SourceLocation getQuestionLoc() const { return QuestionLoc; } |
4131 | SourceLocation getColonLoc() const { return ColonLoc; } |
4132 | |
4133 | static bool classof(const Stmt *T) { |
4134 | return T->getStmtClass() == ConditionalOperatorClass || |
4135 | T->getStmtClass() == BinaryConditionalOperatorClass; |
4136 | } |
4137 | }; |
4138 | |
4139 | /// ConditionalOperator - The ?: ternary operator. The GNU "missing |
4140 | /// middle" extension is a BinaryConditionalOperator. |
4141 | class ConditionalOperator : public AbstractConditionalOperator { |
4142 | enum { COND, LHS, RHS, END_EXPR }; |
4143 | Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. |
4144 | |
4145 | friend class ASTStmtReader; |
4146 | public: |
4147 | ConditionalOperator(Expr *cond, SourceLocation QLoc, Expr *lhs, |
4148 | SourceLocation CLoc, Expr *rhs, QualType t, |
4149 | ExprValueKind VK, ExprObjectKind OK) |
4150 | : AbstractConditionalOperator(ConditionalOperatorClass, t, VK, OK, QLoc, |
4151 | CLoc) { |
4152 | SubExprs[COND] = cond; |
4153 | SubExprs[LHS] = lhs; |
4154 | SubExprs[RHS] = rhs; |
4155 | setDependence(computeDependence(this)); |
4156 | } |
4157 | |
4158 | /// Build an empty conditional operator. |
4159 | explicit ConditionalOperator(EmptyShell Empty) |
4160 | : AbstractConditionalOperator(ConditionalOperatorClass, Empty) { } |
4161 | |
4162 | // getCond - Return the expression representing the condition for |
4163 | // the ?: operator. |
4164 | Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } |
4165 | |
4166 | // getTrueExpr - Return the subexpression representing the value of |
4167 | // the expression if the condition evaluates to true. |
4168 | Expr *getTrueExpr() const { return cast<Expr>(SubExprs[LHS]); } |
4169 | |
4170 | // getFalseExpr - Return the subexpression representing the value of |
4171 | // the expression if the condition evaluates to false. This is |
4172 | // the same as getRHS. |
4173 | Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } |
4174 | |
4175 | Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
4176 | Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
4177 | |
4178 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
4179 | return getCond()->getBeginLoc(); |
4180 | } |
4181 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
4182 | return getRHS()->getEndLoc(); |
4183 | } |
4184 | |
4185 | static bool classof(const Stmt *T) { |
4186 | return T->getStmtClass() == ConditionalOperatorClass; |
4187 | } |
4188 | |
4189 | // Iterators |
4190 | child_range children() { |
4191 | return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); |
4192 | } |
4193 | const_child_range children() const { |
4194 | return const_child_range(&SubExprs[0], &SubExprs[0] + END_EXPR); |
4195 | } |
4196 | }; |
4197 | |
4198 | /// BinaryConditionalOperator - The GNU extension to the conditional |
4199 | /// operator which allows the middle operand to be omitted. |
4200 | /// |
4201 | /// This is a different expression kind on the assumption that almost |
4202 | /// every client ends up needing to know that these are different. |
4203 | class BinaryConditionalOperator : public AbstractConditionalOperator { |
4204 | enum { COMMON, COND, LHS, RHS, NUM_SUBEXPRS }; |
4205 | |
4206 | /// - the common condition/left-hand-side expression, which will be |
4207 | /// evaluated as the opaque value |
4208 | /// - the condition, expressed in terms of the opaque value |
4209 | /// - the left-hand-side, expressed in terms of the opaque value |
4210 | /// - the right-hand-side |
4211 | Stmt *SubExprs[NUM_SUBEXPRS]; |
4212 | OpaqueValueExpr *OpaqueValue; |
4213 | |
4214 | friend class ASTStmtReader; |
4215 | public: |
4216 | BinaryConditionalOperator(Expr *common, OpaqueValueExpr *opaqueValue, |
4217 | Expr *cond, Expr *lhs, Expr *rhs, |
4218 | SourceLocation qloc, SourceLocation cloc, |
4219 | QualType t, ExprValueKind VK, ExprObjectKind OK) |
4220 | : AbstractConditionalOperator(BinaryConditionalOperatorClass, t, VK, OK, |
4221 | qloc, cloc), |
4222 | OpaqueValue(opaqueValue) { |
4223 | SubExprs[COMMON] = common; |
4224 | SubExprs[COND] = cond; |
4225 | SubExprs[LHS] = lhs; |
4226 | SubExprs[RHS] = rhs; |
4227 | assert(OpaqueValue->getSourceExpr() == common && "Wrong opaque value")(static_cast <bool> (OpaqueValue->getSourceExpr() == common && "Wrong opaque value") ? void (0) : __assert_fail ("OpaqueValue->getSourceExpr() == common && \"Wrong opaque value\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4227, __extension__ __PRETTY_FUNCTION__)); |
4228 | setDependence(computeDependence(this)); |
4229 | } |
4230 | |
4231 | /// Build an empty conditional operator. |
4232 | explicit BinaryConditionalOperator(EmptyShell Empty) |
4233 | : AbstractConditionalOperator(BinaryConditionalOperatorClass, Empty) { } |
4234 | |
4235 | /// getCommon - Return the common expression, written to the |
4236 | /// left of the condition. The opaque value will be bound to the |
4237 | /// result of this expression. |
4238 | Expr *getCommon() const { return cast<Expr>(SubExprs[COMMON]); } |
4239 | |
4240 | /// getOpaqueValue - Return the opaque value placeholder. |
4241 | OpaqueValueExpr *getOpaqueValue() const { return OpaqueValue; } |
4242 | |
4243 | /// getCond - Return the condition expression; this is defined |
4244 | /// in terms of the opaque value. |
4245 | Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } |
4246 | |
4247 | /// getTrueExpr - Return the subexpression which will be |
4248 | /// evaluated if the condition evaluates to true; this is defined |
4249 | /// in terms of the opaque value. |
4250 | Expr *getTrueExpr() const { |
4251 | return cast<Expr>(SubExprs[LHS]); |
4252 | } |
4253 | |
4254 | /// getFalseExpr - Return the subexpression which will be |
4255 | /// evaluated if the condnition evaluates to false; this is |
4256 | /// defined in terms of the opaque value. |
4257 | Expr *getFalseExpr() const { |
4258 | return cast<Expr>(SubExprs[RHS]); |
4259 | } |
4260 | |
4261 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
4262 | return getCommon()->getBeginLoc(); |
4263 | } |
4264 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
4265 | return getFalseExpr()->getEndLoc(); |
4266 | } |
4267 | |
4268 | static bool classof(const Stmt *T) { |
4269 | return T->getStmtClass() == BinaryConditionalOperatorClass; |
4270 | } |
4271 | |
4272 | // Iterators |
4273 | child_range children() { |
4274 | return child_range(SubExprs, SubExprs + NUM_SUBEXPRS); |
4275 | } |
4276 | const_child_range children() const { |
4277 | return const_child_range(SubExprs, SubExprs + NUM_SUBEXPRS); |
4278 | } |
4279 | }; |
4280 | |
4281 | inline Expr *AbstractConditionalOperator::getCond() const { |
4282 | if (const ConditionalOperator *co = dyn_cast<ConditionalOperator>(this)) |
4283 | return co->getCond(); |
4284 | return cast<BinaryConditionalOperator>(this)->getCond(); |
4285 | } |
4286 | |
4287 | inline Expr *AbstractConditionalOperator::getTrueExpr() const { |
4288 | if (const ConditionalOperator *co = dyn_cast<ConditionalOperator>(this)) |
4289 | return co->getTrueExpr(); |
4290 | return cast<BinaryConditionalOperator>(this)->getTrueExpr(); |
4291 | } |
4292 | |
4293 | inline Expr *AbstractConditionalOperator::getFalseExpr() const { |
4294 | if (const ConditionalOperator *co = dyn_cast<ConditionalOperator>(this)) |
4295 | return co->getFalseExpr(); |
4296 | return cast<BinaryConditionalOperator>(this)->getFalseExpr(); |
4297 | } |
4298 | |
4299 | /// AddrLabelExpr - The GNU address of label extension, representing &&label. |
4300 | class AddrLabelExpr : public Expr { |
4301 | SourceLocation AmpAmpLoc, LabelLoc; |
4302 | LabelDecl *Label; |
4303 | public: |
4304 | AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelDecl *L, |
4305 | QualType t) |
4306 | : Expr(AddrLabelExprClass, t, VK_PRValue, OK_Ordinary), AmpAmpLoc(AALoc), |
4307 | LabelLoc(LLoc), Label(L) { |
4308 | setDependence(ExprDependence::None); |
4309 | } |
4310 | |
4311 | /// Build an empty address of a label expression. |
4312 | explicit AddrLabelExpr(EmptyShell Empty) |
4313 | : Expr(AddrLabelExprClass, Empty) { } |
4314 | |
4315 | SourceLocation getAmpAmpLoc() const { return AmpAmpLoc; } |
4316 | void setAmpAmpLoc(SourceLocation L) { AmpAmpLoc = L; } |
4317 | SourceLocation getLabelLoc() const { return LabelLoc; } |
4318 | void setLabelLoc(SourceLocation L) { LabelLoc = L; } |
4319 | |
4320 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return AmpAmpLoc; } |
4321 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return LabelLoc; } |
4322 | |
4323 | LabelDecl *getLabel() const { return Label; } |
4324 | void setLabel(LabelDecl *L) { Label = L; } |
4325 | |
4326 | static bool classof(const Stmt *T) { |
4327 | return T->getStmtClass() == AddrLabelExprClass; |
4328 | } |
4329 | |
4330 | // Iterators |
4331 | child_range children() { |
4332 | return child_range(child_iterator(), child_iterator()); |
4333 | } |
4334 | const_child_range children() const { |
4335 | return const_child_range(const_child_iterator(), const_child_iterator()); |
4336 | } |
4337 | }; |
4338 | |
4339 | /// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). |
4340 | /// The StmtExpr contains a single CompoundStmt node, which it evaluates and |
4341 | /// takes the value of the last subexpression. |
4342 | /// |
4343 | /// A StmtExpr is always an r-value; values "returned" out of a |
4344 | /// StmtExpr will be copied. |
4345 | class StmtExpr : public Expr { |
4346 | Stmt *SubStmt; |
4347 | SourceLocation LParenLoc, RParenLoc; |
4348 | public: |
4349 | StmtExpr(CompoundStmt *SubStmt, QualType T, SourceLocation LParenLoc, |
4350 | SourceLocation RParenLoc, unsigned TemplateDepth) |
4351 | : Expr(StmtExprClass, T, VK_PRValue, OK_Ordinary), SubStmt(SubStmt), |
4352 | LParenLoc(LParenLoc), RParenLoc(RParenLoc) { |
4353 | setDependence(computeDependence(this, TemplateDepth)); |
4354 | // FIXME: A templated statement expression should have an associated |
4355 | // DeclContext so that nested declarations always have a dependent context. |
4356 | StmtExprBits.TemplateDepth = TemplateDepth; |
4357 | } |
4358 | |
4359 | /// Build an empty statement expression. |
4360 | explicit StmtExpr(EmptyShell Empty) : Expr(StmtExprClass, Empty) { } |
4361 | |
4362 | CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } |
4363 | const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } |
4364 | void setSubStmt(CompoundStmt *S) { SubStmt = S; } |
4365 | |
4366 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return LParenLoc; } |
4367 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
4368 | |
4369 | SourceLocation getLParenLoc() const { return LParenLoc; } |
4370 | void setLParenLoc(SourceLocation L) { LParenLoc = L; } |
4371 | SourceLocation getRParenLoc() const { return RParenLoc; } |
4372 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
4373 | |
4374 | unsigned getTemplateDepth() const { return StmtExprBits.TemplateDepth; } |
4375 | |
4376 | static bool classof(const Stmt *T) { |
4377 | return T->getStmtClass() == StmtExprClass; |
4378 | } |
4379 | |
4380 | // Iterators |
4381 | child_range children() { return child_range(&SubStmt, &SubStmt+1); } |
4382 | const_child_range children() const { |
4383 | return const_child_range(&SubStmt, &SubStmt + 1); |
4384 | } |
4385 | }; |
4386 | |
4387 | /// ShuffleVectorExpr - clang-specific builtin-in function |
4388 | /// __builtin_shufflevector. |
4389 | /// This AST node represents a operator that does a constant |
4390 | /// shuffle, similar to LLVM's shufflevector instruction. It takes |
4391 | /// two vectors and a variable number of constant indices, |
4392 | /// and returns the appropriately shuffled vector. |
4393 | class ShuffleVectorExpr : public Expr { |
4394 | SourceLocation BuiltinLoc, RParenLoc; |
4395 | |
4396 | // SubExprs - the list of values passed to the __builtin_shufflevector |
4397 | // function. The first two are vectors, and the rest are constant |
4398 | // indices. The number of values in this list is always |
4399 | // 2+the number of indices in the vector type. |
4400 | Stmt **SubExprs; |
4401 | unsigned NumExprs; |
4402 | |
4403 | public: |
4404 | ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args, QualType Type, |
4405 | SourceLocation BLoc, SourceLocation RP); |
4406 | |
4407 | /// Build an empty vector-shuffle expression. |
4408 | explicit ShuffleVectorExpr(EmptyShell Empty) |
4409 | : Expr(ShuffleVectorExprClass, Empty), SubExprs(nullptr) { } |
4410 | |
4411 | SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
4412 | void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } |
4413 | |
4414 | SourceLocation getRParenLoc() const { return RParenLoc; } |
4415 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
4416 | |
4417 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return BuiltinLoc; } |
4418 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
4419 | |
4420 | static bool classof(const Stmt *T) { |
4421 | return T->getStmtClass() == ShuffleVectorExprClass; |
4422 | } |
4423 | |
4424 | /// getNumSubExprs - Return the size of the SubExprs array. This includes the |
4425 | /// constant expression, the actual arguments passed in, and the function |
4426 | /// pointers. |
4427 | unsigned getNumSubExprs() const { return NumExprs; } |
4428 | |
4429 | /// Retrieve the array of expressions. |
4430 | Expr **getSubExprs() { return reinterpret_cast<Expr **>(SubExprs); } |
4431 | |
4432 | /// getExpr - Return the Expr at the specified index. |
4433 | Expr *getExpr(unsigned Index) { |
4434 | assert((Index < NumExprs) && "Arg access out of range!")(static_cast <bool> ((Index < NumExprs) && "Arg access out of range!" ) ? void (0) : __assert_fail ("(Index < NumExprs) && \"Arg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4434, __extension__ __PRETTY_FUNCTION__)); |
4435 | return cast<Expr>(SubExprs[Index]); |
4436 | } |
4437 | const Expr *getExpr(unsigned Index) const { |
4438 | assert((Index < NumExprs) && "Arg access out of range!")(static_cast <bool> ((Index < NumExprs) && "Arg access out of range!" ) ? void (0) : __assert_fail ("(Index < NumExprs) && \"Arg access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4438, __extension__ __PRETTY_FUNCTION__)); |
4439 | return cast<Expr>(SubExprs[Index]); |
4440 | } |
4441 | |
4442 | void setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs); |
4443 | |
4444 | llvm::APSInt getShuffleMaskIdx(const ASTContext &Ctx, unsigned N) const { |
4445 | assert((N < NumExprs - 2) && "Shuffle idx out of range!")(static_cast <bool> ((N < NumExprs - 2) && "Shuffle idx out of range!" ) ? void (0) : __assert_fail ("(N < NumExprs - 2) && \"Shuffle idx out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4445, __extension__ __PRETTY_FUNCTION__)); |
4446 | return getExpr(N+2)->EvaluateKnownConstInt(Ctx); |
4447 | } |
4448 | |
4449 | // Iterators |
4450 | child_range children() { |
4451 | return child_range(&SubExprs[0], &SubExprs[0]+NumExprs); |
4452 | } |
4453 | const_child_range children() const { |
4454 | return const_child_range(&SubExprs[0], &SubExprs[0] + NumExprs); |
4455 | } |
4456 | }; |
4457 | |
4458 | /// ConvertVectorExpr - Clang builtin function __builtin_convertvector |
4459 | /// This AST node provides support for converting a vector type to another |
4460 | /// vector type of the same arity. |
4461 | class ConvertVectorExpr : public Expr { |
4462 | private: |
4463 | Stmt *SrcExpr; |
4464 | TypeSourceInfo *TInfo; |
4465 | SourceLocation BuiltinLoc, RParenLoc; |
4466 | |
4467 | friend class ASTReader; |
4468 | friend class ASTStmtReader; |
4469 | explicit ConvertVectorExpr(EmptyShell Empty) : Expr(ConvertVectorExprClass, Empty) {} |
4470 | |
4471 | public: |
4472 | ConvertVectorExpr(Expr *SrcExpr, TypeSourceInfo *TI, QualType DstType, |
4473 | ExprValueKind VK, ExprObjectKind OK, |
4474 | SourceLocation BuiltinLoc, SourceLocation RParenLoc) |
4475 | : Expr(ConvertVectorExprClass, DstType, VK, OK), SrcExpr(SrcExpr), |
4476 | TInfo(TI), BuiltinLoc(BuiltinLoc), RParenLoc(RParenLoc) { |
4477 | setDependence(computeDependence(this)); |
4478 | } |
4479 | |
4480 | /// getSrcExpr - Return the Expr to be converted. |
4481 | Expr *getSrcExpr() const { return cast<Expr>(SrcExpr); } |
4482 | |
4483 | /// getTypeSourceInfo - Return the destination type. |
4484 | TypeSourceInfo *getTypeSourceInfo() const { |
4485 | return TInfo; |
4486 | } |
4487 | void setTypeSourceInfo(TypeSourceInfo *ti) { |
4488 | TInfo = ti; |
4489 | } |
4490 | |
4491 | /// getBuiltinLoc - Return the location of the __builtin_convertvector token. |
4492 | SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
4493 | |
4494 | /// getRParenLoc - Return the location of final right parenthesis. |
4495 | SourceLocation getRParenLoc() const { return RParenLoc; } |
4496 | |
4497 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return BuiltinLoc; } |
4498 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
4499 | |
4500 | static bool classof(const Stmt *T) { |
4501 | return T->getStmtClass() == ConvertVectorExprClass; |
4502 | } |
4503 | |
4504 | // Iterators |
4505 | child_range children() { return child_range(&SrcExpr, &SrcExpr+1); } |
4506 | const_child_range children() const { |
4507 | return const_child_range(&SrcExpr, &SrcExpr + 1); |
4508 | } |
4509 | }; |
4510 | |
4511 | /// ChooseExpr - GNU builtin-in function __builtin_choose_expr. |
4512 | /// This AST node is similar to the conditional operator (?:) in C, with |
4513 | /// the following exceptions: |
4514 | /// - the test expression must be a integer constant expression. |
4515 | /// - the expression returned acts like the chosen subexpression in every |
4516 | /// visible way: the type is the same as that of the chosen subexpression, |
4517 | /// and all predicates (whether it's an l-value, whether it's an integer |
4518 | /// constant expression, etc.) return the same result as for the chosen |
4519 | /// sub-expression. |
4520 | class ChooseExpr : public Expr { |
4521 | enum { COND, LHS, RHS, END_EXPR }; |
4522 | Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. |
4523 | SourceLocation BuiltinLoc, RParenLoc; |
4524 | bool CondIsTrue; |
4525 | public: |
4526 | ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, |
4527 | ExprValueKind VK, ExprObjectKind OK, SourceLocation RP, |
4528 | bool condIsTrue) |
4529 | : Expr(ChooseExprClass, t, VK, OK), BuiltinLoc(BLoc), RParenLoc(RP), |
4530 | CondIsTrue(condIsTrue) { |
4531 | SubExprs[COND] = cond; |
4532 | SubExprs[LHS] = lhs; |
4533 | SubExprs[RHS] = rhs; |
4534 | |
4535 | setDependence(computeDependence(this)); |
4536 | } |
4537 | |
4538 | /// Build an empty __builtin_choose_expr. |
4539 | explicit ChooseExpr(EmptyShell Empty) : Expr(ChooseExprClass, Empty) { } |
4540 | |
4541 | /// isConditionTrue - Return whether the condition is true (i.e. not |
4542 | /// equal to zero). |
4543 | bool isConditionTrue() const { |
4544 | assert(!isConditionDependent() &&(static_cast <bool> (!isConditionDependent() && "Dependent condition isn't true or false") ? void (0) : __assert_fail ("!isConditionDependent() && \"Dependent condition isn't true or false\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4545, __extension__ __PRETTY_FUNCTION__)) |
4545 | "Dependent condition isn't true or false")(static_cast <bool> (!isConditionDependent() && "Dependent condition isn't true or false") ? void (0) : __assert_fail ("!isConditionDependent() && \"Dependent condition isn't true or false\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4545, __extension__ __PRETTY_FUNCTION__)); |
4546 | return CondIsTrue; |
4547 | } |
4548 | void setIsConditionTrue(bool isTrue) { CondIsTrue = isTrue; } |
4549 | |
4550 | bool isConditionDependent() const { |
4551 | return getCond()->isTypeDependent() || getCond()->isValueDependent(); |
4552 | } |
4553 | |
4554 | /// getChosenSubExpr - Return the subexpression chosen according to the |
4555 | /// condition. |
4556 | Expr *getChosenSubExpr() const { |
4557 | return isConditionTrue() ? getLHS() : getRHS(); |
4558 | } |
4559 | |
4560 | Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } |
4561 | void setCond(Expr *E) { SubExprs[COND] = E; } |
4562 | Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
4563 | void setLHS(Expr *E) { SubExprs[LHS] = E; } |
4564 | Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
4565 | void setRHS(Expr *E) { SubExprs[RHS] = E; } |
4566 | |
4567 | SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
4568 | void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } |
4569 | |
4570 | SourceLocation getRParenLoc() const { return RParenLoc; } |
4571 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
4572 | |
4573 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return BuiltinLoc; } |
4574 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
4575 | |
4576 | static bool classof(const Stmt *T) { |
4577 | return T->getStmtClass() == ChooseExprClass; |
4578 | } |
4579 | |
4580 | // Iterators |
4581 | child_range children() { |
4582 | return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); |
4583 | } |
4584 | const_child_range children() const { |
4585 | return const_child_range(&SubExprs[0], &SubExprs[0] + END_EXPR); |
4586 | } |
4587 | }; |
4588 | |
4589 | /// GNUNullExpr - Implements the GNU __null extension, which is a name |
4590 | /// for a null pointer constant that has integral type (e.g., int or |
4591 | /// long) and is the same size and alignment as a pointer. The __null |
4592 | /// extension is typically only used by system headers, which define |
4593 | /// NULL as __null in C++ rather than using 0 (which is an integer |
4594 | /// that may not match the size of a pointer). |
4595 | class GNUNullExpr : public Expr { |
4596 | /// TokenLoc - The location of the __null keyword. |
4597 | SourceLocation TokenLoc; |
4598 | |
4599 | public: |
4600 | GNUNullExpr(QualType Ty, SourceLocation Loc) |
4601 | : Expr(GNUNullExprClass, Ty, VK_PRValue, OK_Ordinary), TokenLoc(Loc) { |
4602 | setDependence(ExprDependence::None); |
4603 | } |
4604 | |
4605 | /// Build an empty GNU __null expression. |
4606 | explicit GNUNullExpr(EmptyShell Empty) : Expr(GNUNullExprClass, Empty) { } |
4607 | |
4608 | /// getTokenLocation - The location of the __null token. |
4609 | SourceLocation getTokenLocation() const { return TokenLoc; } |
4610 | void setTokenLocation(SourceLocation L) { TokenLoc = L; } |
4611 | |
4612 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return TokenLoc; } |
4613 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return TokenLoc; } |
4614 | |
4615 | static bool classof(const Stmt *T) { |
4616 | return T->getStmtClass() == GNUNullExprClass; |
4617 | } |
4618 | |
4619 | // Iterators |
4620 | child_range children() { |
4621 | return child_range(child_iterator(), child_iterator()); |
4622 | } |
4623 | const_child_range children() const { |
4624 | return const_child_range(const_child_iterator(), const_child_iterator()); |
4625 | } |
4626 | }; |
4627 | |
4628 | /// Represents a call to the builtin function \c __builtin_va_arg. |
4629 | class VAArgExpr : public Expr { |
4630 | Stmt *Val; |
4631 | llvm::PointerIntPair<TypeSourceInfo *, 1, bool> TInfo; |
4632 | SourceLocation BuiltinLoc, RParenLoc; |
4633 | public: |
4634 | VAArgExpr(SourceLocation BLoc, Expr *e, TypeSourceInfo *TInfo, |
4635 | SourceLocation RPLoc, QualType t, bool IsMS) |
4636 | : Expr(VAArgExprClass, t, VK_PRValue, OK_Ordinary), Val(e), |
4637 | TInfo(TInfo, IsMS), BuiltinLoc(BLoc), RParenLoc(RPLoc) { |
4638 | setDependence(computeDependence(this)); |
4639 | } |
4640 | |
4641 | /// Create an empty __builtin_va_arg expression. |
4642 | explicit VAArgExpr(EmptyShell Empty) |
4643 | : Expr(VAArgExprClass, Empty), Val(nullptr), TInfo(nullptr, false) {} |
4644 | |
4645 | const Expr *getSubExpr() const { return cast<Expr>(Val); } |
4646 | Expr *getSubExpr() { return cast<Expr>(Val); } |
4647 | void setSubExpr(Expr *E) { Val = E; } |
4648 | |
4649 | /// Returns whether this is really a Win64 ABI va_arg expression. |
4650 | bool isMicrosoftABI() const { return TInfo.getInt(); } |
4651 | void setIsMicrosoftABI(bool IsMS) { TInfo.setInt(IsMS); } |
4652 | |
4653 | TypeSourceInfo *getWrittenTypeInfo() const { return TInfo.getPointer(); } |
4654 | void setWrittenTypeInfo(TypeSourceInfo *TI) { TInfo.setPointer(TI); } |
4655 | |
4656 | SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
4657 | void setBuiltinLoc(SourceLocation L) { BuiltinLoc = L; } |
4658 | |
4659 | SourceLocation getRParenLoc() const { return RParenLoc; } |
4660 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
4661 | |
4662 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return BuiltinLoc; } |
4663 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
4664 | |
4665 | static bool classof(const Stmt *T) { |
4666 | return T->getStmtClass() == VAArgExprClass; |
4667 | } |
4668 | |
4669 | // Iterators |
4670 | child_range children() { return child_range(&Val, &Val+1); } |
4671 | const_child_range children() const { |
4672 | return const_child_range(&Val, &Val + 1); |
4673 | } |
4674 | }; |
4675 | |
4676 | /// Represents a function call to one of __builtin_LINE(), __builtin_COLUMN(), |
4677 | /// __builtin_FUNCTION(), or __builtin_FILE(). |
4678 | class SourceLocExpr final : public Expr { |
4679 | SourceLocation BuiltinLoc, RParenLoc; |
4680 | DeclContext *ParentContext; |
4681 | |
4682 | public: |
4683 | enum IdentKind { Function, File, Line, Column }; |
4684 | |
4685 | SourceLocExpr(const ASTContext &Ctx, IdentKind Type, SourceLocation BLoc, |
4686 | SourceLocation RParenLoc, DeclContext *Context); |
4687 | |
4688 | /// Build an empty call expression. |
4689 | explicit SourceLocExpr(EmptyShell Empty) : Expr(SourceLocExprClass, Empty) {} |
4690 | |
4691 | /// Return the result of evaluating this SourceLocExpr in the specified |
4692 | /// (and possibly null) default argument or initialization context. |
4693 | APValue EvaluateInContext(const ASTContext &Ctx, |
4694 | const Expr *DefaultExpr) const; |
4695 | |
4696 | /// Return a string representing the name of the specific builtin function. |
4697 | StringRef getBuiltinStr() const; |
4698 | |
4699 | IdentKind getIdentKind() const { |
4700 | return static_cast<IdentKind>(SourceLocExprBits.Kind); |
4701 | } |
4702 | |
4703 | bool isStringType() const { |
4704 | switch (getIdentKind()) { |
4705 | case File: |
4706 | case Function: |
4707 | return true; |
4708 | case Line: |
4709 | case Column: |
4710 | return false; |
4711 | } |
4712 | llvm_unreachable("unknown source location expression kind")::llvm::llvm_unreachable_internal("unknown source location expression kind" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4712); |
4713 | } |
4714 | bool isIntType() const LLVM_READONLY__attribute__((__pure__)) { return !isStringType(); } |
4715 | |
4716 | /// If the SourceLocExpr has been resolved return the subexpression |
4717 | /// representing the resolved value. Otherwise return null. |
4718 | const DeclContext *getParentContext() const { return ParentContext; } |
4719 | DeclContext *getParentContext() { return ParentContext; } |
4720 | |
4721 | SourceLocation getLocation() const { return BuiltinLoc; } |
4722 | SourceLocation getBeginLoc() const { return BuiltinLoc; } |
4723 | SourceLocation getEndLoc() const { return RParenLoc; } |
4724 | |
4725 | child_range children() { |
4726 | return child_range(child_iterator(), child_iterator()); |
4727 | } |
4728 | |
4729 | const_child_range children() const { |
4730 | return const_child_range(child_iterator(), child_iterator()); |
4731 | } |
4732 | |
4733 | static bool classof(const Stmt *T) { |
4734 | return T->getStmtClass() == SourceLocExprClass; |
4735 | } |
4736 | |
4737 | private: |
4738 | friend class ASTStmtReader; |
4739 | }; |
4740 | |
4741 | /// Describes an C or C++ initializer list. |
4742 | /// |
4743 | /// InitListExpr describes an initializer list, which can be used to |
4744 | /// initialize objects of different types, including |
4745 | /// struct/class/union types, arrays, and vectors. For example: |
4746 | /// |
4747 | /// @code |
4748 | /// struct foo x = { 1, { 2, 3 } }; |
4749 | /// @endcode |
4750 | /// |
4751 | /// Prior to semantic analysis, an initializer list will represent the |
4752 | /// initializer list as written by the user, but will have the |
4753 | /// placeholder type "void". This initializer list is called the |
4754 | /// syntactic form of the initializer, and may contain C99 designated |
4755 | /// initializers (represented as DesignatedInitExprs), initializations |
4756 | /// of subobject members without explicit braces, and so on. Clients |
4757 | /// interested in the original syntax of the initializer list should |
4758 | /// use the syntactic form of the initializer list. |
4759 | /// |
4760 | /// After semantic analysis, the initializer list will represent the |
4761 | /// semantic form of the initializer, where the initializations of all |
4762 | /// subobjects are made explicit with nested InitListExpr nodes and |
4763 | /// C99 designators have been eliminated by placing the designated |
4764 | /// initializations into the subobject they initialize. Additionally, |
4765 | /// any "holes" in the initialization, where no initializer has been |
4766 | /// specified for a particular subobject, will be replaced with |
4767 | /// implicitly-generated ImplicitValueInitExpr expressions that |
4768 | /// value-initialize the subobjects. Note, however, that the |
4769 | /// initializer lists may still have fewer initializers than there are |
4770 | /// elements to initialize within the object. |
4771 | /// |
4772 | /// After semantic analysis has completed, given an initializer list, |
4773 | /// method isSemanticForm() returns true if and only if this is the |
4774 | /// semantic form of the initializer list (note: the same AST node |
4775 | /// may at the same time be the syntactic form). |
4776 | /// Given the semantic form of the initializer list, one can retrieve |
4777 | /// the syntactic form of that initializer list (when different) |
4778 | /// using method getSyntacticForm(); the method returns null if applied |
4779 | /// to a initializer list which is already in syntactic form. |
4780 | /// Similarly, given the syntactic form (i.e., an initializer list such |
4781 | /// that isSemanticForm() returns false), one can retrieve the semantic |
4782 | /// form using method getSemanticForm(). |
4783 | /// Since many initializer lists have the same syntactic and semantic forms, |
4784 | /// getSyntacticForm() may return NULL, indicating that the current |
4785 | /// semantic initializer list also serves as its syntactic form. |
4786 | class InitListExpr : public Expr { |
4787 | // FIXME: Eliminate this vector in favor of ASTContext allocation |
4788 | typedef ASTVector<Stmt *> InitExprsTy; |
4789 | InitExprsTy InitExprs; |
4790 | SourceLocation LBraceLoc, RBraceLoc; |
4791 | |
4792 | /// The alternative form of the initializer list (if it exists). |
4793 | /// The int part of the pair stores whether this initializer list is |
4794 | /// in semantic form. If not null, the pointer points to: |
4795 | /// - the syntactic form, if this is in semantic form; |
4796 | /// - the semantic form, if this is in syntactic form. |
4797 | llvm::PointerIntPair<InitListExpr *, 1, bool> AltForm; |
4798 | |
4799 | /// Either: |
4800 | /// If this initializer list initializes an array with more elements than |
4801 | /// there are initializers in the list, specifies an expression to be used |
4802 | /// for value initialization of the rest of the elements. |
4803 | /// Or |
4804 | /// If this initializer list initializes a union, specifies which |
4805 | /// field within the union will be initialized. |
4806 | llvm::PointerUnion<Expr *, FieldDecl *> ArrayFillerOrUnionFieldInit; |
4807 | |
4808 | public: |
4809 | InitListExpr(const ASTContext &C, SourceLocation lbraceloc, |
4810 | ArrayRef<Expr*> initExprs, SourceLocation rbraceloc); |
4811 | |
4812 | /// Build an empty initializer list. |
4813 | explicit InitListExpr(EmptyShell Empty) |
4814 | : Expr(InitListExprClass, Empty), AltForm(nullptr, true) { } |
4815 | |
4816 | unsigned getNumInits() const { return InitExprs.size(); } |
4817 | |
4818 | /// Retrieve the set of initializers. |
4819 | Expr **getInits() { return reinterpret_cast<Expr **>(InitExprs.data()); } |
4820 | |
4821 | /// Retrieve the set of initializers. |
4822 | Expr * const *getInits() const { |
4823 | return reinterpret_cast<Expr * const *>(InitExprs.data()); |
4824 | } |
4825 | |
4826 | ArrayRef<Expr *> inits() { |
4827 | return llvm::makeArrayRef(getInits(), getNumInits()); |
4828 | } |
4829 | |
4830 | ArrayRef<Expr *> inits() const { |
4831 | return llvm::makeArrayRef(getInits(), getNumInits()); |
4832 | } |
4833 | |
4834 | const Expr *getInit(unsigned Init) const { |
4835 | assert(Init < getNumInits() && "Initializer access out of range!")(static_cast <bool> (Init < getNumInits() && "Initializer access out of range!") ? void (0) : __assert_fail ("Init < getNumInits() && \"Initializer access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4835, __extension__ __PRETTY_FUNCTION__)); |
4836 | return cast_or_null<Expr>(InitExprs[Init]); |
4837 | } |
4838 | |
4839 | Expr *getInit(unsigned Init) { |
4840 | assert(Init < getNumInits() && "Initializer access out of range!")(static_cast <bool> (Init < getNumInits() && "Initializer access out of range!") ? void (0) : __assert_fail ("Init < getNumInits() && \"Initializer access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4840, __extension__ __PRETTY_FUNCTION__)); |
4841 | return cast_or_null<Expr>(InitExprs[Init]); |
4842 | } |
4843 | |
4844 | void setInit(unsigned Init, Expr *expr) { |
4845 | assert(Init < getNumInits() && "Initializer access out of range!")(static_cast <bool> (Init < getNumInits() && "Initializer access out of range!") ? void (0) : __assert_fail ("Init < getNumInits() && \"Initializer access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4845, __extension__ __PRETTY_FUNCTION__)); |
4846 | InitExprs[Init] = expr; |
4847 | |
4848 | if (expr) |
4849 | setDependence(getDependence() | expr->getDependence()); |
4850 | } |
4851 | |
4852 | /// Mark the semantic form of the InitListExpr as error when the semantic |
4853 | /// analysis fails. |
4854 | void markError() { |
4855 | assert(isSemanticForm())(static_cast <bool> (isSemanticForm()) ? void (0) : __assert_fail ("isSemanticForm()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4855, __extension__ __PRETTY_FUNCTION__)); |
4856 | setDependence(getDependence() | ExprDependence::ErrorDependent); |
4857 | } |
4858 | |
4859 | /// Reserve space for some number of initializers. |
4860 | void reserveInits(const ASTContext &C, unsigned NumInits); |
4861 | |
4862 | /// Specify the number of initializers |
4863 | /// |
4864 | /// If there are more than @p NumInits initializers, the remaining |
4865 | /// initializers will be destroyed. If there are fewer than @p |
4866 | /// NumInits initializers, NULL expressions will be added for the |
4867 | /// unknown initializers. |
4868 | void resizeInits(const ASTContext &Context, unsigned NumInits); |
4869 | |
4870 | /// Updates the initializer at index @p Init with the new |
4871 | /// expression @p expr, and returns the old expression at that |
4872 | /// location. |
4873 | /// |
4874 | /// When @p Init is out of range for this initializer list, the |
4875 | /// initializer list will be extended with NULL expressions to |
4876 | /// accommodate the new entry. |
4877 | Expr *updateInit(const ASTContext &C, unsigned Init, Expr *expr); |
4878 | |
4879 | /// If this initializer list initializes an array with more elements |
4880 | /// than there are initializers in the list, specifies an expression to be |
4881 | /// used for value initialization of the rest of the elements. |
4882 | Expr *getArrayFiller() { |
4883 | return ArrayFillerOrUnionFieldInit.dyn_cast<Expr *>(); |
4884 | } |
4885 | const Expr *getArrayFiller() const { |
4886 | return const_cast<InitListExpr *>(this)->getArrayFiller(); |
4887 | } |
4888 | void setArrayFiller(Expr *filler); |
4889 | |
4890 | /// Return true if this is an array initializer and its array "filler" |
4891 | /// has been set. |
4892 | bool hasArrayFiller() const { return getArrayFiller(); } |
4893 | |
4894 | /// If this initializes a union, specifies which field in the |
4895 | /// union to initialize. |
4896 | /// |
4897 | /// Typically, this field is the first named field within the |
4898 | /// union. However, a designated initializer can specify the |
4899 | /// initialization of a different field within the union. |
4900 | FieldDecl *getInitializedFieldInUnion() { |
4901 | return ArrayFillerOrUnionFieldInit.dyn_cast<FieldDecl *>(); |
4902 | } |
4903 | const FieldDecl *getInitializedFieldInUnion() const { |
4904 | return const_cast<InitListExpr *>(this)->getInitializedFieldInUnion(); |
4905 | } |
4906 | void setInitializedFieldInUnion(FieldDecl *FD) { |
4907 | assert((FD == nullptr(static_cast <bool> ((FD == nullptr || getInitializedFieldInUnion () == nullptr || getInitializedFieldInUnion() == FD) && "Only one field of a union may be initialized at a time!") ? void (0) : __assert_fail ("(FD == nullptr || getInitializedFieldInUnion() == nullptr || getInitializedFieldInUnion() == FD) && \"Only one field of a union may be initialized at a time!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4910, __extension__ __PRETTY_FUNCTION__)) |
4908 | || getInitializedFieldInUnion() == nullptr(static_cast <bool> ((FD == nullptr || getInitializedFieldInUnion () == nullptr || getInitializedFieldInUnion() == FD) && "Only one field of a union may be initialized at a time!") ? void (0) : __assert_fail ("(FD == nullptr || getInitializedFieldInUnion() == nullptr || getInitializedFieldInUnion() == FD) && \"Only one field of a union may be initialized at a time!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4910, __extension__ __PRETTY_FUNCTION__)) |
4909 | || getInitializedFieldInUnion() == FD)(static_cast <bool> ((FD == nullptr || getInitializedFieldInUnion () == nullptr || getInitializedFieldInUnion() == FD) && "Only one field of a union may be initialized at a time!") ? void (0) : __assert_fail ("(FD == nullptr || getInitializedFieldInUnion() == nullptr || getInitializedFieldInUnion() == FD) && \"Only one field of a union may be initialized at a time!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4910, __extension__ __PRETTY_FUNCTION__)) |
4910 | && "Only one field of a union may be initialized at a time!")(static_cast <bool> ((FD == nullptr || getInitializedFieldInUnion () == nullptr || getInitializedFieldInUnion() == FD) && "Only one field of a union may be initialized at a time!") ? void (0) : __assert_fail ("(FD == nullptr || getInitializedFieldInUnion() == nullptr || getInitializedFieldInUnion() == FD) && \"Only one field of a union may be initialized at a time!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 4910, __extension__ __PRETTY_FUNCTION__)); |
4911 | ArrayFillerOrUnionFieldInit = FD; |
4912 | } |
4913 | |
4914 | // Explicit InitListExpr's originate from source code (and have valid source |
4915 | // locations). Implicit InitListExpr's are created by the semantic analyzer. |
4916 | // FIXME: This is wrong; InitListExprs created by semantic analysis have |
4917 | // valid source locations too! |
4918 | bool isExplicit() const { |
4919 | return LBraceLoc.isValid() && RBraceLoc.isValid(); |
4920 | } |
4921 | |
4922 | // Is this an initializer for an array of characters, initialized by a string |
4923 | // literal or an @encode? |
4924 | bool isStringLiteralInit() const; |
4925 | |
4926 | /// Is this a transparent initializer list (that is, an InitListExpr that is |
4927 | /// purely syntactic, and whose semantics are that of the sole contained |
4928 | /// initializer)? |
4929 | bool isTransparent() const; |
4930 | |
4931 | /// Is this the zero initializer {0} in a language which considers it |
4932 | /// idiomatic? |
4933 | bool isIdiomaticZeroInitializer(const LangOptions &LangOpts) const; |
4934 | |
4935 | SourceLocation getLBraceLoc() const { return LBraceLoc; } |
4936 | void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; } |
4937 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
4938 | void setRBraceLoc(SourceLocation Loc) { RBraceLoc = Loc; } |
4939 | |
4940 | bool isSemanticForm() const { return AltForm.getInt(); } |
4941 | InitListExpr *getSemanticForm() const { |
4942 | return isSemanticForm() ? nullptr : AltForm.getPointer(); |
4943 | } |
4944 | bool isSyntacticForm() const { |
4945 | return !AltForm.getInt() || !AltForm.getPointer(); |
4946 | } |
4947 | InitListExpr *getSyntacticForm() const { |
4948 | return isSemanticForm() ? AltForm.getPointer() : nullptr; |
4949 | } |
4950 | |
4951 | void setSyntacticForm(InitListExpr *Init) { |
4952 | AltForm.setPointer(Init); |
4953 | AltForm.setInt(true); |
4954 | Init->AltForm.setPointer(this); |
4955 | Init->AltForm.setInt(false); |
4956 | } |
4957 | |
4958 | bool hadArrayRangeDesignator() const { |
4959 | return InitListExprBits.HadArrayRangeDesignator != 0; |
4960 | } |
4961 | void sawArrayRangeDesignator(bool ARD = true) { |
4962 | InitListExprBits.HadArrayRangeDesignator = ARD; |
4963 | } |
4964 | |
4965 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)); |
4966 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)); |
4967 | |
4968 | static bool classof(const Stmt *T) { |
4969 | return T->getStmtClass() == InitListExprClass; |
4970 | } |
4971 | |
4972 | // Iterators |
4973 | child_range children() { |
4974 | const_child_range CCR = const_cast<const InitListExpr *>(this)->children(); |
4975 | return child_range(cast_away_const(CCR.begin()), |
4976 | cast_away_const(CCR.end())); |
4977 | } |
4978 | |
4979 | const_child_range children() const { |
4980 | // FIXME: This does not include the array filler expression. |
4981 | if (InitExprs.empty()) |
4982 | return const_child_range(const_child_iterator(), const_child_iterator()); |
4983 | return const_child_range(&InitExprs[0], &InitExprs[0] + InitExprs.size()); |
4984 | } |
4985 | |
4986 | typedef InitExprsTy::iterator iterator; |
4987 | typedef InitExprsTy::const_iterator const_iterator; |
4988 | typedef InitExprsTy::reverse_iterator reverse_iterator; |
4989 | typedef InitExprsTy::const_reverse_iterator const_reverse_iterator; |
4990 | |
4991 | iterator begin() { return InitExprs.begin(); } |
4992 | const_iterator begin() const { return InitExprs.begin(); } |
4993 | iterator end() { return InitExprs.end(); } |
4994 | const_iterator end() const { return InitExprs.end(); } |
4995 | reverse_iterator rbegin() { return InitExprs.rbegin(); } |
4996 | const_reverse_iterator rbegin() const { return InitExprs.rbegin(); } |
4997 | reverse_iterator rend() { return InitExprs.rend(); } |
4998 | const_reverse_iterator rend() const { return InitExprs.rend(); } |
4999 | |
5000 | friend class ASTStmtReader; |
5001 | friend class ASTStmtWriter; |
5002 | }; |
5003 | |
5004 | /// Represents a C99 designated initializer expression. |
5005 | /// |
5006 | /// A designated initializer expression (C99 6.7.8) contains one or |
5007 | /// more designators (which can be field designators, array |
5008 | /// designators, or GNU array-range designators) followed by an |
5009 | /// expression that initializes the field or element(s) that the |
5010 | /// designators refer to. For example, given: |
5011 | /// |
5012 | /// @code |
5013 | /// struct point { |
5014 | /// double x; |
5015 | /// double y; |
5016 | /// }; |
5017 | /// struct point ptarray[10] = { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; |
5018 | /// @endcode |
5019 | /// |
5020 | /// The InitListExpr contains three DesignatedInitExprs, the first of |
5021 | /// which covers @c [2].y=1.0. This DesignatedInitExpr will have two |
5022 | /// designators, one array designator for @c [2] followed by one field |
5023 | /// designator for @c .y. The initialization expression will be 1.0. |
5024 | class DesignatedInitExpr final |
5025 | : public Expr, |
5026 | private llvm::TrailingObjects<DesignatedInitExpr, Stmt *> { |
5027 | public: |
5028 | /// Forward declaration of the Designator class. |
5029 | class Designator; |
5030 | |
5031 | private: |
5032 | /// The location of the '=' or ':' prior to the actual initializer |
5033 | /// expression. |
5034 | SourceLocation EqualOrColonLoc; |
5035 | |
5036 | /// Whether this designated initializer used the GNU deprecated |
5037 | /// syntax rather than the C99 '=' syntax. |
5038 | unsigned GNUSyntax : 1; |
5039 | |
5040 | /// The number of designators in this initializer expression. |
5041 | unsigned NumDesignators : 15; |
5042 | |
5043 | /// The number of subexpressions of this initializer expression, |
5044 | /// which contains both the initializer and any additional |
5045 | /// expressions used by array and array-range designators. |
5046 | unsigned NumSubExprs : 16; |
5047 | |
5048 | /// The designators in this designated initialization |
5049 | /// expression. |
5050 | Designator *Designators; |
5051 | |
5052 | DesignatedInitExpr(const ASTContext &C, QualType Ty, |
5053 | llvm::ArrayRef<Designator> Designators, |
5054 | SourceLocation EqualOrColonLoc, bool GNUSyntax, |
5055 | ArrayRef<Expr *> IndexExprs, Expr *Init); |
5056 | |
5057 | explicit DesignatedInitExpr(unsigned NumSubExprs) |
5058 | : Expr(DesignatedInitExprClass, EmptyShell()), |
5059 | NumDesignators(0), NumSubExprs(NumSubExprs), Designators(nullptr) { } |
5060 | |
5061 | public: |
5062 | /// A field designator, e.g., ".x". |
5063 | struct FieldDesignator { |
5064 | /// Refers to the field that is being initialized. The low bit |
5065 | /// of this field determines whether this is actually a pointer |
5066 | /// to an IdentifierInfo (if 1) or a FieldDecl (if 0). When |
5067 | /// initially constructed, a field designator will store an |
5068 | /// IdentifierInfo*. After semantic analysis has resolved that |
5069 | /// name, the field designator will instead store a FieldDecl*. |
5070 | uintptr_t NameOrField; |
5071 | |
5072 | /// The location of the '.' in the designated initializer. |
5073 | SourceLocation DotLoc; |
5074 | |
5075 | /// The location of the field name in the designated initializer. |
5076 | SourceLocation FieldLoc; |
5077 | }; |
5078 | |
5079 | /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". |
5080 | struct ArrayOrRangeDesignator { |
5081 | /// Location of the first index expression within the designated |
5082 | /// initializer expression's list of subexpressions. |
5083 | unsigned Index; |
5084 | /// The location of the '[' starting the array range designator. |
5085 | SourceLocation LBracketLoc; |
5086 | /// The location of the ellipsis separating the start and end |
5087 | /// indices. Only valid for GNU array-range designators. |
5088 | SourceLocation EllipsisLoc; |
5089 | /// The location of the ']' terminating the array range designator. |
5090 | SourceLocation RBracketLoc; |
5091 | }; |
5092 | |
5093 | /// Represents a single C99 designator. |
5094 | /// |
5095 | /// @todo This class is infuriatingly similar to clang::Designator, |
5096 | /// but minor differences (storing indices vs. storing pointers) |
5097 | /// keep us from reusing it. Try harder, later, to rectify these |
5098 | /// differences. |
5099 | class Designator { |
5100 | /// The kind of designator this describes. |
5101 | enum { |
5102 | FieldDesignator, |
5103 | ArrayDesignator, |
5104 | ArrayRangeDesignator |
5105 | } Kind; |
5106 | |
5107 | union { |
5108 | /// A field designator, e.g., ".x". |
5109 | struct FieldDesignator Field; |
5110 | /// An array or GNU array-range designator, e.g., "[9]" or "[10..15]". |
5111 | struct ArrayOrRangeDesignator ArrayOrRange; |
5112 | }; |
5113 | friend class DesignatedInitExpr; |
5114 | |
5115 | public: |
5116 | Designator() {} |
5117 | |
5118 | /// Initializes a field designator. |
5119 | Designator(const IdentifierInfo *FieldName, SourceLocation DotLoc, |
5120 | SourceLocation FieldLoc) |
5121 | : Kind(FieldDesignator) { |
5122 | new (&Field) DesignatedInitExpr::FieldDesignator; |
5123 | Field.NameOrField = reinterpret_cast<uintptr_t>(FieldName) | 0x01; |
5124 | Field.DotLoc = DotLoc; |
5125 | Field.FieldLoc = FieldLoc; |
5126 | } |
5127 | |
5128 | /// Initializes an array designator. |
5129 | Designator(unsigned Index, SourceLocation LBracketLoc, |
5130 | SourceLocation RBracketLoc) |
5131 | : Kind(ArrayDesignator) { |
5132 | new (&ArrayOrRange) DesignatedInitExpr::ArrayOrRangeDesignator; |
5133 | ArrayOrRange.Index = Index; |
5134 | ArrayOrRange.LBracketLoc = LBracketLoc; |
5135 | ArrayOrRange.EllipsisLoc = SourceLocation(); |
5136 | ArrayOrRange.RBracketLoc = RBracketLoc; |
5137 | } |
5138 | |
5139 | /// Initializes a GNU array-range designator. |
5140 | Designator(unsigned Index, SourceLocation LBracketLoc, |
5141 | SourceLocation EllipsisLoc, SourceLocation RBracketLoc) |
5142 | : Kind(ArrayRangeDesignator) { |
5143 | new (&ArrayOrRange) DesignatedInitExpr::ArrayOrRangeDesignator; |
5144 | ArrayOrRange.Index = Index; |
5145 | ArrayOrRange.LBracketLoc = LBracketLoc; |
5146 | ArrayOrRange.EllipsisLoc = EllipsisLoc; |
5147 | ArrayOrRange.RBracketLoc = RBracketLoc; |
5148 | } |
5149 | |
5150 | bool isFieldDesignator() const { return Kind == FieldDesignator; } |
5151 | bool isArrayDesignator() const { return Kind == ArrayDesignator; } |
5152 | bool isArrayRangeDesignator() const { return Kind == ArrayRangeDesignator; } |
5153 | |
5154 | IdentifierInfo *getFieldName() const; |
5155 | |
5156 | FieldDecl *getField() const { |
5157 | assert(Kind == FieldDesignator && "Only valid on a field designator")(static_cast <bool> (Kind == FieldDesignator && "Only valid on a field designator") ? void (0) : __assert_fail ("Kind == FieldDesignator && \"Only valid on a field designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5157, __extension__ __PRETTY_FUNCTION__)); |
5158 | if (Field.NameOrField & 0x01) |
5159 | return nullptr; |
5160 | else |
5161 | return reinterpret_cast<FieldDecl *>(Field.NameOrField); |
5162 | } |
5163 | |
5164 | void setField(FieldDecl *FD) { |
5165 | assert(Kind == FieldDesignator && "Only valid on a field designator")(static_cast <bool> (Kind == FieldDesignator && "Only valid on a field designator") ? void (0) : __assert_fail ("Kind == FieldDesignator && \"Only valid on a field designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5165, __extension__ __PRETTY_FUNCTION__)); |
5166 | Field.NameOrField = reinterpret_cast<uintptr_t>(FD); |
5167 | } |
5168 | |
5169 | SourceLocation getDotLoc() const { |
5170 | assert(Kind == FieldDesignator && "Only valid on a field designator")(static_cast <bool> (Kind == FieldDesignator && "Only valid on a field designator") ? void (0) : __assert_fail ("Kind == FieldDesignator && \"Only valid on a field designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5170, __extension__ __PRETTY_FUNCTION__)); |
5171 | return Field.DotLoc; |
5172 | } |
5173 | |
5174 | SourceLocation getFieldLoc() const { |
5175 | assert(Kind == FieldDesignator && "Only valid on a field designator")(static_cast <bool> (Kind == FieldDesignator && "Only valid on a field designator") ? void (0) : __assert_fail ("Kind == FieldDesignator && \"Only valid on a field designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5175, __extension__ __PRETTY_FUNCTION__)); |
5176 | return Field.FieldLoc; |
5177 | } |
5178 | |
5179 | SourceLocation getLBracketLoc() const { |
5180 | assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) &&(static_cast <bool> ((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && "Only valid on an array or array-range designator" ) ? void (0) : __assert_fail ("(Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && \"Only valid on an array or array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5181, __extension__ __PRETTY_FUNCTION__)) |
5181 | "Only valid on an array or array-range designator")(static_cast <bool> ((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && "Only valid on an array or array-range designator" ) ? void (0) : __assert_fail ("(Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && \"Only valid on an array or array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5181, __extension__ __PRETTY_FUNCTION__)); |
5182 | return ArrayOrRange.LBracketLoc; |
5183 | } |
5184 | |
5185 | SourceLocation getRBracketLoc() const { |
5186 | assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) &&(static_cast <bool> ((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && "Only valid on an array or array-range designator" ) ? void (0) : __assert_fail ("(Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && \"Only valid on an array or array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5187, __extension__ __PRETTY_FUNCTION__)) |
5187 | "Only valid on an array or array-range designator")(static_cast <bool> ((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && "Only valid on an array or array-range designator" ) ? void (0) : __assert_fail ("(Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && \"Only valid on an array or array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5187, __extension__ __PRETTY_FUNCTION__)); |
5188 | return ArrayOrRange.RBracketLoc; |
5189 | } |
5190 | |
5191 | SourceLocation getEllipsisLoc() const { |
5192 | assert(Kind == ArrayRangeDesignator &&(static_cast <bool> (Kind == ArrayRangeDesignator && "Only valid on an array-range designator") ? void (0) : __assert_fail ("Kind == ArrayRangeDesignator && \"Only valid on an array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5193, __extension__ __PRETTY_FUNCTION__)) |
5193 | "Only valid on an array-range designator")(static_cast <bool> (Kind == ArrayRangeDesignator && "Only valid on an array-range designator") ? void (0) : __assert_fail ("Kind == ArrayRangeDesignator && \"Only valid on an array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5193, __extension__ __PRETTY_FUNCTION__)); |
5194 | return ArrayOrRange.EllipsisLoc; |
5195 | } |
5196 | |
5197 | unsigned getFirstExprIndex() const { |
5198 | assert((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) &&(static_cast <bool> ((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && "Only valid on an array or array-range designator" ) ? void (0) : __assert_fail ("(Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && \"Only valid on an array or array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5199, __extension__ __PRETTY_FUNCTION__)) |
5199 | "Only valid on an array or array-range designator")(static_cast <bool> ((Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && "Only valid on an array or array-range designator" ) ? void (0) : __assert_fail ("(Kind == ArrayDesignator || Kind == ArrayRangeDesignator) && \"Only valid on an array or array-range designator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5199, __extension__ __PRETTY_FUNCTION__)); |
5200 | return ArrayOrRange.Index; |
5201 | } |
5202 | |
5203 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
5204 | if (Kind == FieldDesignator) |
5205 | return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc(); |
5206 | else |
5207 | return getLBracketLoc(); |
5208 | } |
5209 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
5210 | return Kind == FieldDesignator ? getFieldLoc() : getRBracketLoc(); |
5211 | } |
5212 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { |
5213 | return SourceRange(getBeginLoc(), getEndLoc()); |
5214 | } |
5215 | }; |
5216 | |
5217 | static DesignatedInitExpr *Create(const ASTContext &C, |
5218 | llvm::ArrayRef<Designator> Designators, |
5219 | ArrayRef<Expr*> IndexExprs, |
5220 | SourceLocation EqualOrColonLoc, |
5221 | bool GNUSyntax, Expr *Init); |
5222 | |
5223 | static DesignatedInitExpr *CreateEmpty(const ASTContext &C, |
5224 | unsigned NumIndexExprs); |
5225 | |
5226 | /// Returns the number of designators in this initializer. |
5227 | unsigned size() const { return NumDesignators; } |
5228 | |
5229 | // Iterator access to the designators. |
5230 | llvm::MutableArrayRef<Designator> designators() { |
5231 | return {Designators, NumDesignators}; |
5232 | } |
5233 | |
5234 | llvm::ArrayRef<Designator> designators() const { |
5235 | return {Designators, NumDesignators}; |
5236 | } |
5237 | |
5238 | Designator *getDesignator(unsigned Idx) { return &designators()[Idx]; } |
5239 | const Designator *getDesignator(unsigned Idx) const { |
5240 | return &designators()[Idx]; |
5241 | } |
5242 | |
5243 | void setDesignators(const ASTContext &C, const Designator *Desigs, |
5244 | unsigned NumDesigs); |
5245 | |
5246 | Expr *getArrayIndex(const Designator &D) const; |
5247 | Expr *getArrayRangeStart(const Designator &D) const; |
5248 | Expr *getArrayRangeEnd(const Designator &D) const; |
5249 | |
5250 | /// Retrieve the location of the '=' that precedes the |
5251 | /// initializer value itself, if present. |
5252 | SourceLocation getEqualOrColonLoc() const { return EqualOrColonLoc; } |
5253 | void setEqualOrColonLoc(SourceLocation L) { EqualOrColonLoc = L; } |
5254 | |
5255 | /// Whether this designated initializer should result in direct-initialization |
5256 | /// of the designated subobject (eg, '{.foo{1, 2, 3}}'). |
5257 | bool isDirectInit() const { return EqualOrColonLoc.isInvalid(); } |
5258 | |
5259 | /// Determines whether this designated initializer used the |
5260 | /// deprecated GNU syntax for designated initializers. |
5261 | bool usesGNUSyntax() const { return GNUSyntax; } |
5262 | void setGNUSyntax(bool GNU) { GNUSyntax = GNU; } |
5263 | |
5264 | /// Retrieve the initializer value. |
5265 | Expr *getInit() const { |
5266 | return cast<Expr>(*const_cast<DesignatedInitExpr*>(this)->child_begin()); |
5267 | } |
5268 | |
5269 | void setInit(Expr *init) { |
5270 | *child_begin() = init; |
5271 | } |
5272 | |
5273 | /// Retrieve the total number of subexpressions in this |
5274 | /// designated initializer expression, including the actual |
5275 | /// initialized value and any expressions that occur within array |
5276 | /// and array-range designators. |
5277 | unsigned getNumSubExprs() const { return NumSubExprs; } |
5278 | |
5279 | Expr *getSubExpr(unsigned Idx) const { |
5280 | assert(Idx < NumSubExprs && "Subscript out of range")(static_cast <bool> (Idx < NumSubExprs && "Subscript out of range" ) ? void (0) : __assert_fail ("Idx < NumSubExprs && \"Subscript out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5280, __extension__ __PRETTY_FUNCTION__)); |
5281 | return cast<Expr>(getTrailingObjects<Stmt *>()[Idx]); |
5282 | } |
5283 | |
5284 | void setSubExpr(unsigned Idx, Expr *E) { |
5285 | assert(Idx < NumSubExprs && "Subscript out of range")(static_cast <bool> (Idx < NumSubExprs && "Subscript out of range" ) ? void (0) : __assert_fail ("Idx < NumSubExprs && \"Subscript out of range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5285, __extension__ __PRETTY_FUNCTION__)); |
5286 | getTrailingObjects<Stmt *>()[Idx] = E; |
5287 | } |
5288 | |
5289 | /// Replaces the designator at index @p Idx with the series |
5290 | /// of designators in [First, Last). |
5291 | void ExpandDesignator(const ASTContext &C, unsigned Idx, |
5292 | const Designator *First, const Designator *Last); |
5293 | |
5294 | SourceRange getDesignatorsSourceRange() const; |
5295 | |
5296 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)); |
5297 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)); |
5298 | |
5299 | static bool classof(const Stmt *T) { |
5300 | return T->getStmtClass() == DesignatedInitExprClass; |
5301 | } |
5302 | |
5303 | // Iterators |
5304 | child_range children() { |
5305 | Stmt **begin = getTrailingObjects<Stmt *>(); |
5306 | return child_range(begin, begin + NumSubExprs); |
5307 | } |
5308 | const_child_range children() const { |
5309 | Stmt * const *begin = getTrailingObjects<Stmt *>(); |
5310 | return const_child_range(begin, begin + NumSubExprs); |
5311 | } |
5312 | |
5313 | friend TrailingObjects; |
5314 | }; |
5315 | |
5316 | /// Represents a place-holder for an object not to be initialized by |
5317 | /// anything. |
5318 | /// |
5319 | /// This only makes sense when it appears as part of an updater of a |
5320 | /// DesignatedInitUpdateExpr (see below). The base expression of a DIUE |
5321 | /// initializes a big object, and the NoInitExpr's mark the spots within the |
5322 | /// big object not to be overwritten by the updater. |
5323 | /// |
5324 | /// \see DesignatedInitUpdateExpr |
5325 | class NoInitExpr : public Expr { |
5326 | public: |
5327 | explicit NoInitExpr(QualType ty) |
5328 | : Expr(NoInitExprClass, ty, VK_PRValue, OK_Ordinary) { |
5329 | setDependence(computeDependence(this)); |
5330 | } |
5331 | |
5332 | explicit NoInitExpr(EmptyShell Empty) |
5333 | : Expr(NoInitExprClass, Empty) { } |
5334 | |
5335 | static bool classof(const Stmt *T) { |
5336 | return T->getStmtClass() == NoInitExprClass; |
5337 | } |
5338 | |
5339 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return SourceLocation(); } |
5340 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return SourceLocation(); } |
5341 | |
5342 | // Iterators |
5343 | child_range children() { |
5344 | return child_range(child_iterator(), child_iterator()); |
5345 | } |
5346 | const_child_range children() const { |
5347 | return const_child_range(const_child_iterator(), const_child_iterator()); |
5348 | } |
5349 | }; |
5350 | |
5351 | // In cases like: |
5352 | // struct Q { int a, b, c; }; |
5353 | // Q *getQ(); |
5354 | // void foo() { |
5355 | // struct A { Q q; } a = { *getQ(), .q.b = 3 }; |
5356 | // } |
5357 | // |
5358 | // We will have an InitListExpr for a, with type A, and then a |
5359 | // DesignatedInitUpdateExpr for "a.q" with type Q. The "base" for this DIUE |
5360 | // is the call expression *getQ(); the "updater" for the DIUE is ".q.b = 3" |
5361 | // |
5362 | class DesignatedInitUpdateExpr : public Expr { |
5363 | // BaseAndUpdaterExprs[0] is the base expression; |
5364 | // BaseAndUpdaterExprs[1] is an InitListExpr overwriting part of the base. |
5365 | Stmt *BaseAndUpdaterExprs[2]; |
5366 | |
5367 | public: |
5368 | DesignatedInitUpdateExpr(const ASTContext &C, SourceLocation lBraceLoc, |
5369 | Expr *baseExprs, SourceLocation rBraceLoc); |
5370 | |
5371 | explicit DesignatedInitUpdateExpr(EmptyShell Empty) |
5372 | : Expr(DesignatedInitUpdateExprClass, Empty) { } |
5373 | |
5374 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)); |
5375 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)); |
5376 | |
5377 | static bool classof(const Stmt *T) { |
5378 | return T->getStmtClass() == DesignatedInitUpdateExprClass; |
5379 | } |
5380 | |
5381 | Expr *getBase() const { return cast<Expr>(BaseAndUpdaterExprs[0]); } |
5382 | void setBase(Expr *Base) { BaseAndUpdaterExprs[0] = Base; } |
5383 | |
5384 | InitListExpr *getUpdater() const { |
5385 | return cast<InitListExpr>(BaseAndUpdaterExprs[1]); |
5386 | } |
5387 | void setUpdater(Expr *Updater) { BaseAndUpdaterExprs[1] = Updater; } |
5388 | |
5389 | // Iterators |
5390 | // children = the base and the updater |
5391 | child_range children() { |
5392 | return child_range(&BaseAndUpdaterExprs[0], &BaseAndUpdaterExprs[0] + 2); |
5393 | } |
5394 | const_child_range children() const { |
5395 | return const_child_range(&BaseAndUpdaterExprs[0], |
5396 | &BaseAndUpdaterExprs[0] + 2); |
5397 | } |
5398 | }; |
5399 | |
5400 | /// Represents a loop initializing the elements of an array. |
5401 | /// |
5402 | /// The need to initialize the elements of an array occurs in a number of |
5403 | /// contexts: |
5404 | /// |
5405 | /// * in the implicit copy/move constructor for a class with an array member |
5406 | /// * when a lambda-expression captures an array by value |
5407 | /// * when a decomposition declaration decomposes an array |
5408 | /// |
5409 | /// There are two subexpressions: a common expression (the source array) |
5410 | /// that is evaluated once up-front, and a per-element initializer that |
5411 | /// runs once for each array element. |
5412 | /// |
5413 | /// Within the per-element initializer, the common expression may be referenced |
5414 | /// via an OpaqueValueExpr, and the current index may be obtained via an |
5415 | /// ArrayInitIndexExpr. |
5416 | class ArrayInitLoopExpr : public Expr { |
5417 | Stmt *SubExprs[2]; |
5418 | |
5419 | explicit ArrayInitLoopExpr(EmptyShell Empty) |
5420 | : Expr(ArrayInitLoopExprClass, Empty), SubExprs{} {} |
5421 | |
5422 | public: |
5423 | explicit ArrayInitLoopExpr(QualType T, Expr *CommonInit, Expr *ElementInit) |
5424 | : Expr(ArrayInitLoopExprClass, T, VK_PRValue, OK_Ordinary), |
5425 | SubExprs{CommonInit, ElementInit} { |
5426 | setDependence(computeDependence(this)); |
5427 | } |
5428 | |
5429 | /// Get the common subexpression shared by all initializations (the source |
5430 | /// array). |
5431 | OpaqueValueExpr *getCommonExpr() const { |
5432 | return cast<OpaqueValueExpr>(SubExprs[0]); |
5433 | } |
5434 | |
5435 | /// Get the initializer to use for each array element. |
5436 | Expr *getSubExpr() const { return cast<Expr>(SubExprs[1]); } |
5437 | |
5438 | llvm::APInt getArraySize() const { |
5439 | return cast<ConstantArrayType>(getType()->castAsArrayTypeUnsafe()) |
5440 | ->getSize(); |
5441 | } |
5442 | |
5443 | static bool classof(const Stmt *S) { |
5444 | return S->getStmtClass() == ArrayInitLoopExprClass; |
5445 | } |
5446 | |
5447 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
5448 | return getCommonExpr()->getBeginLoc(); |
5449 | } |
5450 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
5451 | return getCommonExpr()->getEndLoc(); |
5452 | } |
5453 | |
5454 | child_range children() { |
5455 | return child_range(SubExprs, SubExprs + 2); |
5456 | } |
5457 | const_child_range children() const { |
5458 | return const_child_range(SubExprs, SubExprs + 2); |
5459 | } |
5460 | |
5461 | friend class ASTReader; |
5462 | friend class ASTStmtReader; |
5463 | friend class ASTStmtWriter; |
5464 | }; |
5465 | |
5466 | /// Represents the index of the current element of an array being |
5467 | /// initialized by an ArrayInitLoopExpr. This can only appear within the |
5468 | /// subexpression of an ArrayInitLoopExpr. |
5469 | class ArrayInitIndexExpr : public Expr { |
5470 | explicit ArrayInitIndexExpr(EmptyShell Empty) |
5471 | : Expr(ArrayInitIndexExprClass, Empty) {} |
5472 | |
5473 | public: |
5474 | explicit ArrayInitIndexExpr(QualType T) |
5475 | : Expr(ArrayInitIndexExprClass, T, VK_PRValue, OK_Ordinary) { |
5476 | setDependence(ExprDependence::None); |
5477 | } |
5478 | |
5479 | static bool classof(const Stmt *S) { |
5480 | return S->getStmtClass() == ArrayInitIndexExprClass; |
5481 | } |
5482 | |
5483 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return SourceLocation(); } |
5484 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return SourceLocation(); } |
5485 | |
5486 | child_range children() { |
5487 | return child_range(child_iterator(), child_iterator()); |
5488 | } |
5489 | const_child_range children() const { |
5490 | return const_child_range(const_child_iterator(), const_child_iterator()); |
5491 | } |
5492 | |
5493 | friend class ASTReader; |
5494 | friend class ASTStmtReader; |
5495 | }; |
5496 | |
5497 | /// Represents an implicitly-generated value initialization of |
5498 | /// an object of a given type. |
5499 | /// |
5500 | /// Implicit value initializations occur within semantic initializer |
5501 | /// list expressions (InitListExpr) as placeholders for subobject |
5502 | /// initializations not explicitly specified by the user. |
5503 | /// |
5504 | /// \see InitListExpr |
5505 | class ImplicitValueInitExpr : public Expr { |
5506 | public: |
5507 | explicit ImplicitValueInitExpr(QualType ty) |
5508 | : Expr(ImplicitValueInitExprClass, ty, VK_PRValue, OK_Ordinary) { |
5509 | setDependence(computeDependence(this)); |
5510 | } |
5511 | |
5512 | /// Construct an empty implicit value initialization. |
5513 | explicit ImplicitValueInitExpr(EmptyShell Empty) |
5514 | : Expr(ImplicitValueInitExprClass, Empty) { } |
5515 | |
5516 | static bool classof(const Stmt *T) { |
5517 | return T->getStmtClass() == ImplicitValueInitExprClass; |
5518 | } |
5519 | |
5520 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return SourceLocation(); } |
5521 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return SourceLocation(); } |
5522 | |
5523 | // Iterators |
5524 | child_range children() { |
5525 | return child_range(child_iterator(), child_iterator()); |
5526 | } |
5527 | const_child_range children() const { |
5528 | return const_child_range(const_child_iterator(), const_child_iterator()); |
5529 | } |
5530 | }; |
5531 | |
5532 | class ParenListExpr final |
5533 | : public Expr, |
5534 | private llvm::TrailingObjects<ParenListExpr, Stmt *> { |
5535 | friend class ASTStmtReader; |
5536 | friend TrailingObjects; |
5537 | |
5538 | /// The location of the left and right parentheses. |
5539 | SourceLocation LParenLoc, RParenLoc; |
5540 | |
5541 | /// Build a paren list. |
5542 | ParenListExpr(SourceLocation LParenLoc, ArrayRef<Expr *> Exprs, |
5543 | SourceLocation RParenLoc); |
5544 | |
5545 | /// Build an empty paren list. |
5546 | ParenListExpr(EmptyShell Empty, unsigned NumExprs); |
5547 | |
5548 | public: |
5549 | /// Create a paren list. |
5550 | static ParenListExpr *Create(const ASTContext &Ctx, SourceLocation LParenLoc, |
5551 | ArrayRef<Expr *> Exprs, |
5552 | SourceLocation RParenLoc); |
5553 | |
5554 | /// Create an empty paren list. |
5555 | static ParenListExpr *CreateEmpty(const ASTContext &Ctx, unsigned NumExprs); |
5556 | |
5557 | /// Return the number of expressions in this paren list. |
5558 | unsigned getNumExprs() const { return ParenListExprBits.NumExprs; } |
5559 | |
5560 | Expr *getExpr(unsigned Init) { |
5561 | assert(Init < getNumExprs() && "Initializer access out of range!")(static_cast <bool> (Init < getNumExprs() && "Initializer access out of range!") ? void (0) : __assert_fail ("Init < getNumExprs() && \"Initializer access out of range!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5561, __extension__ __PRETTY_FUNCTION__)); |
5562 | return getExprs()[Init]; |
5563 | } |
5564 | |
5565 | const Expr *getExpr(unsigned Init) const { |
5566 | return const_cast<ParenListExpr *>(this)->getExpr(Init); |
5567 | } |
5568 | |
5569 | Expr **getExprs() { |
5570 | return reinterpret_cast<Expr **>(getTrailingObjects<Stmt *>()); |
5571 | } |
5572 | |
5573 | ArrayRef<Expr *> exprs() { |
5574 | return llvm::makeArrayRef(getExprs(), getNumExprs()); |
5575 | } |
5576 | |
5577 | SourceLocation getLParenLoc() const { return LParenLoc; } |
5578 | SourceLocation getRParenLoc() const { return RParenLoc; } |
5579 | SourceLocation getBeginLoc() const { return getLParenLoc(); } |
5580 | SourceLocation getEndLoc() const { return getRParenLoc(); } |
5581 | |
5582 | static bool classof(const Stmt *T) { |
5583 | return T->getStmtClass() == ParenListExprClass; |
5584 | } |
5585 | |
5586 | // Iterators |
5587 | child_range children() { |
5588 | return child_range(getTrailingObjects<Stmt *>(), |
5589 | getTrailingObjects<Stmt *>() + getNumExprs()); |
5590 | } |
5591 | const_child_range children() const { |
5592 | return const_child_range(getTrailingObjects<Stmt *>(), |
5593 | getTrailingObjects<Stmt *>() + getNumExprs()); |
5594 | } |
5595 | }; |
5596 | |
5597 | /// Represents a C11 generic selection. |
5598 | /// |
5599 | /// A generic selection (C11 6.5.1.1) contains an unevaluated controlling |
5600 | /// expression, followed by one or more generic associations. Each generic |
5601 | /// association specifies a type name and an expression, or "default" and an |
5602 | /// expression (in which case it is known as a default generic association). |
5603 | /// The type and value of the generic selection are identical to those of its |
5604 | /// result expression, which is defined as the expression in the generic |
5605 | /// association with a type name that is compatible with the type of the |
5606 | /// controlling expression, or the expression in the default generic association |
5607 | /// if no types are compatible. For example: |
5608 | /// |
5609 | /// @code |
5610 | /// _Generic(X, double: 1, float: 2, default: 3) |
5611 | /// @endcode |
5612 | /// |
5613 | /// The above expression evaluates to 1 if 1.0 is substituted for X, 2 if 1.0f |
5614 | /// or 3 if "hello". |
5615 | /// |
5616 | /// As an extension, generic selections are allowed in C++, where the following |
5617 | /// additional semantics apply: |
5618 | /// |
5619 | /// Any generic selection whose controlling expression is type-dependent or |
5620 | /// which names a dependent type in its association list is result-dependent, |
5621 | /// which means that the choice of result expression is dependent. |
5622 | /// Result-dependent generic associations are both type- and value-dependent. |
5623 | class GenericSelectionExpr final |
5624 | : public Expr, |
5625 | private llvm::TrailingObjects<GenericSelectionExpr, Stmt *, |
5626 | TypeSourceInfo *> { |
5627 | friend class ASTStmtReader; |
5628 | friend class ASTStmtWriter; |
5629 | friend TrailingObjects; |
5630 | |
5631 | /// The number of association expressions and the index of the result |
5632 | /// expression in the case where the generic selection expression is not |
5633 | /// result-dependent. The result index is equal to ResultDependentIndex |
5634 | /// if and only if the generic selection expression is result-dependent. |
5635 | unsigned NumAssocs, ResultIndex; |
5636 | enum : unsigned { |
5637 | ResultDependentIndex = std::numeric_limits<unsigned>::max(), |
5638 | ControllingIndex = 0, |
5639 | AssocExprStartIndex = 1 |
5640 | }; |
5641 | |
5642 | /// The location of the "default" and of the right parenthesis. |
5643 | SourceLocation DefaultLoc, RParenLoc; |
5644 | |
5645 | // GenericSelectionExpr is followed by several trailing objects. |
5646 | // They are (in order): |
5647 | // |
5648 | // * A single Stmt * for the controlling expression. |
5649 | // * An array of getNumAssocs() Stmt * for the association expressions. |
5650 | // * An array of getNumAssocs() TypeSourceInfo *, one for each of the |
5651 | // association expressions. |
5652 | unsigned numTrailingObjects(OverloadToken<Stmt *>) const { |
5653 | // Add one to account for the controlling expression; the remainder |
5654 | // are the associated expressions. |
5655 | return 1 + getNumAssocs(); |
5656 | } |
5657 | |
5658 | unsigned numTrailingObjects(OverloadToken<TypeSourceInfo *>) const { |
5659 | return getNumAssocs(); |
5660 | } |
5661 | |
5662 | template <bool Const> class AssociationIteratorTy; |
5663 | /// Bundle together an association expression and its TypeSourceInfo. |
5664 | /// The Const template parameter is for the const and non-const versions |
5665 | /// of AssociationTy. |
5666 | template <bool Const> class AssociationTy { |
5667 | friend class GenericSelectionExpr; |
5668 | template <bool OtherConst> friend class AssociationIteratorTy; |
5669 | using ExprPtrTy = std::conditional_t<Const, const Expr *, Expr *>; |
5670 | using TSIPtrTy = |
5671 | std::conditional_t<Const, const TypeSourceInfo *, TypeSourceInfo *>; |
5672 | ExprPtrTy E; |
5673 | TSIPtrTy TSI; |
5674 | bool Selected; |
5675 | AssociationTy(ExprPtrTy E, TSIPtrTy TSI, bool Selected) |
5676 | : E(E), TSI(TSI), Selected(Selected) {} |
5677 | |
5678 | public: |
5679 | ExprPtrTy getAssociationExpr() const { return E; } |
5680 | TSIPtrTy getTypeSourceInfo() const { return TSI; } |
5681 | QualType getType() const { return TSI ? TSI->getType() : QualType(); } |
5682 | bool isSelected() const { return Selected; } |
5683 | AssociationTy *operator->() { return this; } |
5684 | const AssociationTy *operator->() const { return this; } |
5685 | }; // class AssociationTy |
5686 | |
5687 | /// Iterator over const and non-const Association objects. The Association |
5688 | /// objects are created on the fly when the iterator is dereferenced. |
5689 | /// This abstract over how exactly the association expressions and the |
5690 | /// corresponding TypeSourceInfo * are stored. |
5691 | template <bool Const> |
5692 | class AssociationIteratorTy |
5693 | : public llvm::iterator_facade_base< |
5694 | AssociationIteratorTy<Const>, std::input_iterator_tag, |
5695 | AssociationTy<Const>, std::ptrdiff_t, AssociationTy<Const>, |
5696 | AssociationTy<Const>> { |
5697 | friend class GenericSelectionExpr; |
5698 | // FIXME: This iterator could conceptually be a random access iterator, and |
5699 | // it would be nice if we could strengthen the iterator category someday. |
5700 | // However this iterator does not satisfy two requirements of forward |
5701 | // iterators: |
5702 | // a) reference = T& or reference = const T& |
5703 | // b) If It1 and It2 are both dereferenceable, then It1 == It2 if and only |
5704 | // if *It1 and *It2 are bound to the same objects. |
5705 | // An alternative design approach was discussed during review; |
5706 | // store an Association object inside the iterator, and return a reference |
5707 | // to it when dereferenced. This idea was discarded beacuse of nasty |
5708 | // lifetime issues: |
5709 | // AssociationIterator It = ...; |
5710 | // const Association &Assoc = *It++; // Oops, Assoc is dangling. |
5711 | using BaseTy = typename AssociationIteratorTy::iterator_facade_base; |
5712 | using StmtPtrPtrTy = |
5713 | std::conditional_t<Const, const Stmt *const *, Stmt **>; |
5714 | using TSIPtrPtrTy = std::conditional_t<Const, const TypeSourceInfo *const *, |
5715 | TypeSourceInfo **>; |
5716 | StmtPtrPtrTy E; // = nullptr; FIXME: Once support for gcc 4.8 is dropped. |
5717 | TSIPtrPtrTy TSI; // Kept in sync with E. |
5718 | unsigned Offset = 0, SelectedOffset = 0; |
5719 | AssociationIteratorTy(StmtPtrPtrTy E, TSIPtrPtrTy TSI, unsigned Offset, |
5720 | unsigned SelectedOffset) |
5721 | : E(E), TSI(TSI), Offset(Offset), SelectedOffset(SelectedOffset) {} |
5722 | |
5723 | public: |
5724 | AssociationIteratorTy() : E(nullptr), TSI(nullptr) {} |
5725 | typename BaseTy::reference operator*() const { |
5726 | return AssociationTy<Const>(cast<Expr>(*E), *TSI, |
5727 | Offset == SelectedOffset); |
5728 | } |
5729 | typename BaseTy::pointer operator->() const { return **this; } |
5730 | using BaseTy::operator++; |
5731 | AssociationIteratorTy &operator++() { |
5732 | ++E; |
5733 | ++TSI; |
5734 | ++Offset; |
5735 | return *this; |
5736 | } |
5737 | bool operator==(AssociationIteratorTy Other) const { return E == Other.E; } |
5738 | }; // class AssociationIterator |
5739 | |
5740 | /// Build a non-result-dependent generic selection expression. |
5741 | GenericSelectionExpr(const ASTContext &Context, SourceLocation GenericLoc, |
5742 | Expr *ControllingExpr, |
5743 | ArrayRef<TypeSourceInfo *> AssocTypes, |
5744 | ArrayRef<Expr *> AssocExprs, SourceLocation DefaultLoc, |
5745 | SourceLocation RParenLoc, |
5746 | bool ContainsUnexpandedParameterPack, |
5747 | unsigned ResultIndex); |
5748 | |
5749 | /// Build a result-dependent generic selection expression. |
5750 | GenericSelectionExpr(const ASTContext &Context, SourceLocation GenericLoc, |
5751 | Expr *ControllingExpr, |
5752 | ArrayRef<TypeSourceInfo *> AssocTypes, |
5753 | ArrayRef<Expr *> AssocExprs, SourceLocation DefaultLoc, |
5754 | SourceLocation RParenLoc, |
5755 | bool ContainsUnexpandedParameterPack); |
5756 | |
5757 | /// Build an empty generic selection expression for deserialization. |
5758 | explicit GenericSelectionExpr(EmptyShell Empty, unsigned NumAssocs); |
5759 | |
5760 | public: |
5761 | /// Create a non-result-dependent generic selection expression. |
5762 | static GenericSelectionExpr * |
5763 | Create(const ASTContext &Context, SourceLocation GenericLoc, |
5764 | Expr *ControllingExpr, ArrayRef<TypeSourceInfo *> AssocTypes, |
5765 | ArrayRef<Expr *> AssocExprs, SourceLocation DefaultLoc, |
5766 | SourceLocation RParenLoc, bool ContainsUnexpandedParameterPack, |
5767 | unsigned ResultIndex); |
5768 | |
5769 | /// Create a result-dependent generic selection expression. |
5770 | static GenericSelectionExpr * |
5771 | Create(const ASTContext &Context, SourceLocation GenericLoc, |
5772 | Expr *ControllingExpr, ArrayRef<TypeSourceInfo *> AssocTypes, |
5773 | ArrayRef<Expr *> AssocExprs, SourceLocation DefaultLoc, |
5774 | SourceLocation RParenLoc, bool ContainsUnexpandedParameterPack); |
5775 | |
5776 | /// Create an empty generic selection expression for deserialization. |
5777 | static GenericSelectionExpr *CreateEmpty(const ASTContext &Context, |
5778 | unsigned NumAssocs); |
5779 | |
5780 | using Association = AssociationTy<false>; |
5781 | using ConstAssociation = AssociationTy<true>; |
5782 | using AssociationIterator = AssociationIteratorTy<false>; |
5783 | using ConstAssociationIterator = AssociationIteratorTy<true>; |
5784 | using association_range = llvm::iterator_range<AssociationIterator>; |
5785 | using const_association_range = |
5786 | llvm::iterator_range<ConstAssociationIterator>; |
5787 | |
5788 | /// The number of association expressions. |
5789 | unsigned getNumAssocs() const { return NumAssocs; } |
5790 | |
5791 | /// The zero-based index of the result expression's generic association in |
5792 | /// the generic selection's association list. Defined only if the |
5793 | /// generic selection is not result-dependent. |
5794 | unsigned getResultIndex() const { |
5795 | assert(!isResultDependent() &&(static_cast <bool> (!isResultDependent() && "Generic selection is result-dependent but getResultIndex called!" ) ? void (0) : __assert_fail ("!isResultDependent() && \"Generic selection is result-dependent but getResultIndex called!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5796, __extension__ __PRETTY_FUNCTION__)) |
5796 | "Generic selection is result-dependent but getResultIndex called!")(static_cast <bool> (!isResultDependent() && "Generic selection is result-dependent but getResultIndex called!" ) ? void (0) : __assert_fail ("!isResultDependent() && \"Generic selection is result-dependent but getResultIndex called!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5796, __extension__ __PRETTY_FUNCTION__)); |
5797 | return ResultIndex; |
5798 | } |
5799 | |
5800 | /// Whether this generic selection is result-dependent. |
5801 | bool isResultDependent() const { return ResultIndex == ResultDependentIndex; } |
5802 | |
5803 | /// Return the controlling expression of this generic selection expression. |
5804 | Expr *getControllingExpr() { |
5805 | return cast<Expr>(getTrailingObjects<Stmt *>()[ControllingIndex]); |
5806 | } |
5807 | const Expr *getControllingExpr() const { |
5808 | return cast<Expr>(getTrailingObjects<Stmt *>()[ControllingIndex]); |
5809 | } |
5810 | |
5811 | /// Return the result expression of this controlling expression. Defined if |
5812 | /// and only if the generic selection expression is not result-dependent. |
5813 | Expr *getResultExpr() { |
5814 | return cast<Expr>( |
5815 | getTrailingObjects<Stmt *>()[AssocExprStartIndex + getResultIndex()]); |
5816 | } |
5817 | const Expr *getResultExpr() const { |
5818 | return cast<Expr>( |
5819 | getTrailingObjects<Stmt *>()[AssocExprStartIndex + getResultIndex()]); |
5820 | } |
5821 | |
5822 | ArrayRef<Expr *> getAssocExprs() const { |
5823 | return {reinterpret_cast<Expr *const *>(getTrailingObjects<Stmt *>() + |
5824 | AssocExprStartIndex), |
5825 | NumAssocs}; |
5826 | } |
5827 | ArrayRef<TypeSourceInfo *> getAssocTypeSourceInfos() const { |
5828 | return {getTrailingObjects<TypeSourceInfo *>(), NumAssocs}; |
5829 | } |
5830 | |
5831 | /// Return the Ith association expression with its TypeSourceInfo, |
5832 | /// bundled together in GenericSelectionExpr::(Const)Association. |
5833 | Association getAssociation(unsigned I) { |
5834 | assert(I < getNumAssocs() &&(static_cast <bool> (I < getNumAssocs() && "Out-of-range index in GenericSelectionExpr::getAssociation!" ) ? void (0) : __assert_fail ("I < getNumAssocs() && \"Out-of-range index in GenericSelectionExpr::getAssociation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5835, __extension__ __PRETTY_FUNCTION__)) |
5835 | "Out-of-range index in GenericSelectionExpr::getAssociation!")(static_cast <bool> (I < getNumAssocs() && "Out-of-range index in GenericSelectionExpr::getAssociation!" ) ? void (0) : __assert_fail ("I < getNumAssocs() && \"Out-of-range index in GenericSelectionExpr::getAssociation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5835, __extension__ __PRETTY_FUNCTION__)); |
5836 | return Association( |
5837 | cast<Expr>(getTrailingObjects<Stmt *>()[AssocExprStartIndex + I]), |
5838 | getTrailingObjects<TypeSourceInfo *>()[I], |
5839 | !isResultDependent() && (getResultIndex() == I)); |
5840 | } |
5841 | ConstAssociation getAssociation(unsigned I) const { |
5842 | assert(I < getNumAssocs() &&(static_cast <bool> (I < getNumAssocs() && "Out-of-range index in GenericSelectionExpr::getAssociation!" ) ? void (0) : __assert_fail ("I < getNumAssocs() && \"Out-of-range index in GenericSelectionExpr::getAssociation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5843, __extension__ __PRETTY_FUNCTION__)) |
5843 | "Out-of-range index in GenericSelectionExpr::getAssociation!")(static_cast <bool> (I < getNumAssocs() && "Out-of-range index in GenericSelectionExpr::getAssociation!" ) ? void (0) : __assert_fail ("I < getNumAssocs() && \"Out-of-range index in GenericSelectionExpr::getAssociation!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 5843, __extension__ __PRETTY_FUNCTION__)); |
5844 | return ConstAssociation( |
5845 | cast<Expr>(getTrailingObjects<Stmt *>()[AssocExprStartIndex + I]), |
5846 | getTrailingObjects<TypeSourceInfo *>()[I], |
5847 | !isResultDependent() && (getResultIndex() == I)); |
5848 | } |
5849 | |
5850 | association_range associations() { |
5851 | AssociationIterator Begin(getTrailingObjects<Stmt *>() + |
5852 | AssocExprStartIndex, |
5853 | getTrailingObjects<TypeSourceInfo *>(), |
5854 | /*Offset=*/0, ResultIndex); |
5855 | AssociationIterator End(Begin.E + NumAssocs, Begin.TSI + NumAssocs, |
5856 | /*Offset=*/NumAssocs, ResultIndex); |
5857 | return llvm::make_range(Begin, End); |
5858 | } |
5859 | |
5860 | const_association_range associations() const { |
5861 | ConstAssociationIterator Begin(getTrailingObjects<Stmt *>() + |
5862 | AssocExprStartIndex, |
5863 | getTrailingObjects<TypeSourceInfo *>(), |
5864 | /*Offset=*/0, ResultIndex); |
5865 | ConstAssociationIterator End(Begin.E + NumAssocs, Begin.TSI + NumAssocs, |
5866 | /*Offset=*/NumAssocs, ResultIndex); |
5867 | return llvm::make_range(Begin, End); |
5868 | } |
5869 | |
5870 | SourceLocation getGenericLoc() const { |
5871 | return GenericSelectionExprBits.GenericLoc; |
5872 | } |
5873 | SourceLocation getDefaultLoc() const { return DefaultLoc; } |
5874 | SourceLocation getRParenLoc() const { return RParenLoc; } |
5875 | SourceLocation getBeginLoc() const { return getGenericLoc(); } |
5876 | SourceLocation getEndLoc() const { return getRParenLoc(); } |
5877 | |
5878 | static bool classof(const Stmt *T) { |
5879 | return T->getStmtClass() == GenericSelectionExprClass; |
5880 | } |
5881 | |
5882 | child_range children() { |
5883 | return child_range(getTrailingObjects<Stmt *>(), |
5884 | getTrailingObjects<Stmt *>() + |
5885 | numTrailingObjects(OverloadToken<Stmt *>())); |
5886 | } |
5887 | const_child_range children() const { |
5888 | return const_child_range(getTrailingObjects<Stmt *>(), |
5889 | getTrailingObjects<Stmt *>() + |
5890 | numTrailingObjects(OverloadToken<Stmt *>())); |
5891 | } |
5892 | }; |
5893 | |
5894 | //===----------------------------------------------------------------------===// |
5895 | // Clang Extensions |
5896 | //===----------------------------------------------------------------------===// |
5897 | |
5898 | /// ExtVectorElementExpr - This represents access to specific elements of a |
5899 | /// vector, and may occur on the left hand side or right hand side. For example |
5900 | /// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. |
5901 | /// |
5902 | /// Note that the base may have either vector or pointer to vector type, just |
5903 | /// like a struct field reference. |
5904 | /// |
5905 | class ExtVectorElementExpr : public Expr { |
5906 | Stmt *Base; |
5907 | IdentifierInfo *Accessor; |
5908 | SourceLocation AccessorLoc; |
5909 | public: |
5910 | ExtVectorElementExpr(QualType ty, ExprValueKind VK, Expr *base, |
5911 | IdentifierInfo &accessor, SourceLocation loc) |
5912 | : Expr(ExtVectorElementExprClass, ty, VK, |
5913 | (VK == VK_PRValue ? OK_Ordinary : OK_VectorComponent)), |
5914 | Base(base), Accessor(&accessor), AccessorLoc(loc) { |
5915 | setDependence(computeDependence(this)); |
5916 | } |
5917 | |
5918 | /// Build an empty vector element expression. |
5919 | explicit ExtVectorElementExpr(EmptyShell Empty) |
5920 | : Expr(ExtVectorElementExprClass, Empty) { } |
5921 | |
5922 | const Expr *getBase() const { return cast<Expr>(Base); } |
5923 | Expr *getBase() { return cast<Expr>(Base); } |
5924 | void setBase(Expr *E) { Base = E; } |
5925 | |
5926 | IdentifierInfo &getAccessor() const { return *Accessor; } |
5927 | void setAccessor(IdentifierInfo *II) { Accessor = II; } |
5928 | |
5929 | SourceLocation getAccessorLoc() const { return AccessorLoc; } |
5930 | void setAccessorLoc(SourceLocation L) { AccessorLoc = L; } |
5931 | |
5932 | /// getNumElements - Get the number of components being selected. |
5933 | unsigned getNumElements() const; |
5934 | |
5935 | /// containsDuplicateElements - Return true if any element access is |
5936 | /// repeated. |
5937 | bool containsDuplicateElements() const; |
5938 | |
5939 | /// getEncodedElementAccess - Encode the elements accessed into an llvm |
5940 | /// aggregate Constant of ConstantInt(s). |
5941 | void getEncodedElementAccess(SmallVectorImpl<uint32_t> &Elts) const; |
5942 | |
5943 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
5944 | return getBase()->getBeginLoc(); |
5945 | } |
5946 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return AccessorLoc; } |
5947 | |
5948 | /// isArrow - Return true if the base expression is a pointer to vector, |
5949 | /// return false if the base expression is a vector. |
5950 | bool isArrow() const; |
5951 | |
5952 | static bool classof(const Stmt *T) { |
5953 | return T->getStmtClass() == ExtVectorElementExprClass; |
5954 | } |
5955 | |
5956 | // Iterators |
5957 | child_range children() { return child_range(&Base, &Base+1); } |
5958 | const_child_range children() const { |
5959 | return const_child_range(&Base, &Base + 1); |
5960 | } |
5961 | }; |
5962 | |
5963 | /// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. |
5964 | /// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } |
5965 | class BlockExpr : public Expr { |
5966 | protected: |
5967 | BlockDecl *TheBlock; |
5968 | public: |
5969 | BlockExpr(BlockDecl *BD, QualType ty) |
5970 | : Expr(BlockExprClass, ty, VK_PRValue, OK_Ordinary), TheBlock(BD) { |
5971 | setDependence(computeDependence(this)); |
5972 | } |
5973 | |
5974 | /// Build an empty block expression. |
5975 | explicit BlockExpr(EmptyShell Empty) : Expr(BlockExprClass, Empty) { } |
5976 | |
5977 | const BlockDecl *getBlockDecl() const { return TheBlock; } |
5978 | BlockDecl *getBlockDecl() { return TheBlock; } |
5979 | void setBlockDecl(BlockDecl *BD) { TheBlock = BD; } |
5980 | |
5981 | // Convenience functions for probing the underlying BlockDecl. |
5982 | SourceLocation getCaretLocation() const; |
5983 | const Stmt *getBody() const; |
5984 | Stmt *getBody(); |
5985 | |
5986 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
5987 | return getCaretLocation(); |
5988 | } |
5989 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
5990 | return getBody()->getEndLoc(); |
5991 | } |
5992 | |
5993 | /// getFunctionType - Return the underlying function type for this block. |
5994 | const FunctionProtoType *getFunctionType() const; |
5995 | |
5996 | static bool classof(const Stmt *T) { |
5997 | return T->getStmtClass() == BlockExprClass; |
5998 | } |
5999 | |
6000 | // Iterators |
6001 | child_range children() { |
6002 | return child_range(child_iterator(), child_iterator()); |
6003 | } |
6004 | const_child_range children() const { |
6005 | return const_child_range(const_child_iterator(), const_child_iterator()); |
6006 | } |
6007 | }; |
6008 | |
6009 | /// Copy initialization expr of a __block variable and a boolean flag that |
6010 | /// indicates whether the expression can throw. |
6011 | struct BlockVarCopyInit { |
6012 | BlockVarCopyInit() = default; |
6013 | BlockVarCopyInit(Expr *CopyExpr, bool CanThrow) |
6014 | : ExprAndFlag(CopyExpr, CanThrow) {} |
6015 | void setExprAndFlag(Expr *CopyExpr, bool CanThrow) { |
6016 | ExprAndFlag.setPointerAndInt(CopyExpr, CanThrow); |
6017 | } |
6018 | Expr *getCopyExpr() const { return ExprAndFlag.getPointer(); } |
6019 | bool canThrow() const { return ExprAndFlag.getInt(); } |
6020 | llvm::PointerIntPair<Expr *, 1, bool> ExprAndFlag; |
6021 | }; |
6022 | |
6023 | /// AsTypeExpr - Clang builtin function __builtin_astype [OpenCL 6.2.4.2] |
6024 | /// This AST node provides support for reinterpreting a type to another |
6025 | /// type of the same size. |
6026 | class AsTypeExpr : public Expr { |
6027 | private: |
6028 | Stmt *SrcExpr; |
6029 | SourceLocation BuiltinLoc, RParenLoc; |
6030 | |
6031 | friend class ASTReader; |
6032 | friend class ASTStmtReader; |
6033 | explicit AsTypeExpr(EmptyShell Empty) : Expr(AsTypeExprClass, Empty) {} |
6034 | |
6035 | public: |
6036 | AsTypeExpr(Expr *SrcExpr, QualType DstType, ExprValueKind VK, |
6037 | ExprObjectKind OK, SourceLocation BuiltinLoc, |
6038 | SourceLocation RParenLoc) |
6039 | : Expr(AsTypeExprClass, DstType, VK, OK), SrcExpr(SrcExpr), |
6040 | BuiltinLoc(BuiltinLoc), RParenLoc(RParenLoc) { |
6041 | setDependence(computeDependence(this)); |
6042 | } |
6043 | |
6044 | /// getSrcExpr - Return the Expr to be converted. |
6045 | Expr *getSrcExpr() const { return cast<Expr>(SrcExpr); } |
6046 | |
6047 | /// getBuiltinLoc - Return the location of the __builtin_astype token. |
6048 | SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
6049 | |
6050 | /// getRParenLoc - Return the location of final right parenthesis. |
6051 | SourceLocation getRParenLoc() const { return RParenLoc; } |
6052 | |
6053 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return BuiltinLoc; } |
6054 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
6055 | |
6056 | static bool classof(const Stmt *T) { |
6057 | return T->getStmtClass() == AsTypeExprClass; |
6058 | } |
6059 | |
6060 | // Iterators |
6061 | child_range children() { return child_range(&SrcExpr, &SrcExpr+1); } |
6062 | const_child_range children() const { |
6063 | return const_child_range(&SrcExpr, &SrcExpr + 1); |
6064 | } |
6065 | }; |
6066 | |
6067 | /// PseudoObjectExpr - An expression which accesses a pseudo-object |
6068 | /// l-value. A pseudo-object is an abstract object, accesses to which |
6069 | /// are translated to calls. The pseudo-object expression has a |
6070 | /// syntactic form, which shows how the expression was actually |
6071 | /// written in the source code, and a semantic form, which is a series |
6072 | /// of expressions to be executed in order which detail how the |
6073 | /// operation is actually evaluated. Optionally, one of the semantic |
6074 | /// forms may also provide a result value for the expression. |
6075 | /// |
6076 | /// If any of the semantic-form expressions is an OpaqueValueExpr, |
6077 | /// that OVE is required to have a source expression, and it is bound |
6078 | /// to the result of that source expression. Such OVEs may appear |
6079 | /// only in subsequent semantic-form expressions and as |
6080 | /// sub-expressions of the syntactic form. |
6081 | /// |
6082 | /// PseudoObjectExpr should be used only when an operation can be |
6083 | /// usefully described in terms of fairly simple rewrite rules on |
6084 | /// objects and functions that are meant to be used by end-developers. |
6085 | /// For example, under the Itanium ABI, dynamic casts are implemented |
6086 | /// as a call to a runtime function called __dynamic_cast; using this |
6087 | /// class to describe that would be inappropriate because that call is |
6088 | /// not really part of the user-visible semantics, and instead the |
6089 | /// cast is properly reflected in the AST and IR-generation has been |
6090 | /// taught to generate the call as necessary. In contrast, an |
6091 | /// Objective-C property access is semantically defined to be |
6092 | /// equivalent to a particular message send, and this is very much |
6093 | /// part of the user model. The name of this class encourages this |
6094 | /// modelling design. |
6095 | class PseudoObjectExpr final |
6096 | : public Expr, |
6097 | private llvm::TrailingObjects<PseudoObjectExpr, Expr *> { |
6098 | // PseudoObjectExprBits.NumSubExprs - The number of sub-expressions. |
6099 | // Always at least two, because the first sub-expression is the |
6100 | // syntactic form. |
6101 | |
6102 | // PseudoObjectExprBits.ResultIndex - The index of the |
6103 | // sub-expression holding the result. 0 means the result is void, |
6104 | // which is unambiguous because it's the index of the syntactic |
6105 | // form. Note that this is therefore 1 higher than the value passed |
6106 | // in to Create, which is an index within the semantic forms. |
6107 | // Note also that ASTStmtWriter assumes this encoding. |
6108 | |
6109 | Expr **getSubExprsBuffer() { return getTrailingObjects<Expr *>(); } |
6110 | const Expr * const *getSubExprsBuffer() const { |
6111 | return getTrailingObjects<Expr *>(); |
6112 | } |
6113 | |
6114 | PseudoObjectExpr(QualType type, ExprValueKind VK, |
6115 | Expr *syntactic, ArrayRef<Expr*> semantic, |
6116 | unsigned resultIndex); |
6117 | |
6118 | PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs); |
6119 | |
6120 | unsigned getNumSubExprs() const { |
6121 | return PseudoObjectExprBits.NumSubExprs; |
6122 | } |
6123 | |
6124 | public: |
6125 | /// NoResult - A value for the result index indicating that there is |
6126 | /// no semantic result. |
6127 | enum : unsigned { NoResult = ~0U }; |
6128 | |
6129 | static PseudoObjectExpr *Create(const ASTContext &Context, Expr *syntactic, |
6130 | ArrayRef<Expr*> semantic, |
6131 | unsigned resultIndex); |
6132 | |
6133 | static PseudoObjectExpr *Create(const ASTContext &Context, EmptyShell shell, |
6134 | unsigned numSemanticExprs); |
6135 | |
6136 | /// Return the syntactic form of this expression, i.e. the |
6137 | /// expression it actually looks like. Likely to be expressed in |
6138 | /// terms of OpaqueValueExprs bound in the semantic form. |
6139 | Expr *getSyntacticForm() { return getSubExprsBuffer()[0]; } |
6140 | const Expr *getSyntacticForm() const { return getSubExprsBuffer()[0]; } |
6141 | |
6142 | /// Return the index of the result-bearing expression into the semantics |
6143 | /// expressions, or PseudoObjectExpr::NoResult if there is none. |
6144 | unsigned getResultExprIndex() const { |
6145 | if (PseudoObjectExprBits.ResultIndex == 0) return NoResult; |
6146 | return PseudoObjectExprBits.ResultIndex - 1; |
6147 | } |
6148 | |
6149 | /// Return the result-bearing expression, or null if there is none. |
6150 | Expr *getResultExpr() { |
6151 | if (PseudoObjectExprBits.ResultIndex == 0) |
6152 | return nullptr; |
6153 | return getSubExprsBuffer()[PseudoObjectExprBits.ResultIndex]; |
6154 | } |
6155 | const Expr *getResultExpr() const { |
6156 | return const_cast<PseudoObjectExpr*>(this)->getResultExpr(); |
6157 | } |
6158 | |
6159 | unsigned getNumSemanticExprs() const { return getNumSubExprs() - 1; } |
6160 | |
6161 | typedef Expr * const *semantics_iterator; |
6162 | typedef const Expr * const *const_semantics_iterator; |
6163 | semantics_iterator semantics_begin() { |
6164 | return getSubExprsBuffer() + 1; |
6165 | } |
6166 | const_semantics_iterator semantics_begin() const { |
6167 | return getSubExprsBuffer() + 1; |
6168 | } |
6169 | semantics_iterator semantics_end() { |
6170 | return getSubExprsBuffer() + getNumSubExprs(); |
6171 | } |
6172 | const_semantics_iterator semantics_end() const { |
6173 | return getSubExprsBuffer() + getNumSubExprs(); |
6174 | } |
6175 | |
6176 | llvm::iterator_range<semantics_iterator> semantics() { |
6177 | return llvm::make_range(semantics_begin(), semantics_end()); |
6178 | } |
6179 | llvm::iterator_range<const_semantics_iterator> semantics() const { |
6180 | return llvm::make_range(semantics_begin(), semantics_end()); |
6181 | } |
6182 | |
6183 | Expr *getSemanticExpr(unsigned index) { |
6184 | assert(index + 1 < getNumSubExprs())(static_cast <bool> (index + 1 < getNumSubExprs()) ? void (0) : __assert_fail ("index + 1 < getNumSubExprs()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 6184, __extension__ __PRETTY_FUNCTION__)); |
6185 | return getSubExprsBuffer()[index + 1]; |
6186 | } |
6187 | const Expr *getSemanticExpr(unsigned index) const { |
6188 | return const_cast<PseudoObjectExpr*>(this)->getSemanticExpr(index); |
6189 | } |
6190 | |
6191 | SourceLocation getExprLoc() const LLVM_READONLY__attribute__((__pure__)) { |
6192 | return getSyntacticForm()->getExprLoc(); |
6193 | } |
6194 | |
6195 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
6196 | return getSyntacticForm()->getBeginLoc(); |
6197 | } |
6198 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
6199 | return getSyntacticForm()->getEndLoc(); |
6200 | } |
6201 | |
6202 | child_range children() { |
6203 | const_child_range CCR = |
6204 | const_cast<const PseudoObjectExpr *>(this)->children(); |
6205 | return child_range(cast_away_const(CCR.begin()), |
6206 | cast_away_const(CCR.end())); |
6207 | } |
6208 | const_child_range children() const { |
6209 | Stmt *const *cs = const_cast<Stmt *const *>( |
6210 | reinterpret_cast<const Stmt *const *>(getSubExprsBuffer())); |
6211 | return const_child_range(cs, cs + getNumSubExprs()); |
6212 | } |
6213 | |
6214 | static bool classof(const Stmt *T) { |
6215 | return T->getStmtClass() == PseudoObjectExprClass; |
6216 | } |
6217 | |
6218 | friend TrailingObjects; |
6219 | friend class ASTStmtReader; |
6220 | }; |
6221 | |
6222 | /// AtomicExpr - Variadic atomic builtins: __atomic_exchange, __atomic_fetch_*, |
6223 | /// __atomic_load, __atomic_store, and __atomic_compare_exchange_*, for the |
6224 | /// similarly-named C++11 instructions, and __c11 variants for <stdatomic.h>, |
6225 | /// and corresponding __opencl_atomic_* for OpenCL 2.0. |
6226 | /// All of these instructions take one primary pointer, at least one memory |
6227 | /// order. The instructions for which getScopeModel returns non-null value |
6228 | /// take one synch scope. |
6229 | class AtomicExpr : public Expr { |
6230 | public: |
6231 | enum AtomicOp { |
6232 | #define BUILTIN(ID, TYPE, ATTRS) |
6233 | #define ATOMIC_BUILTIN(ID, TYPE, ATTRS) AO ## ID, |
6234 | #include "clang/Basic/Builtins.def" |
6235 | // Avoid trailing comma |
6236 | BI_First = 0 |
6237 | }; |
6238 | |
6239 | private: |
6240 | /// Location of sub-expressions. |
6241 | /// The location of Scope sub-expression is NumSubExprs - 1, which is |
6242 | /// not fixed, therefore is not defined in enum. |
6243 | enum { PTR, ORDER, VAL1, ORDER_FAIL, VAL2, WEAK, END_EXPR }; |
6244 | Stmt *SubExprs[END_EXPR + 1]; |
6245 | unsigned NumSubExprs; |
6246 | SourceLocation BuiltinLoc, RParenLoc; |
6247 | AtomicOp Op; |
6248 | |
6249 | friend class ASTStmtReader; |
6250 | public: |
6251 | AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args, QualType t, |
6252 | AtomicOp op, SourceLocation RP); |
6253 | |
6254 | /// Determine the number of arguments the specified atomic builtin |
6255 | /// should have. |
6256 | static unsigned getNumSubExprs(AtomicOp Op); |
6257 | |
6258 | /// Build an empty AtomicExpr. |
6259 | explicit AtomicExpr(EmptyShell Empty) : Expr(AtomicExprClass, Empty) { } |
6260 | |
6261 | Expr *getPtr() const { |
6262 | return cast<Expr>(SubExprs[PTR]); |
6263 | } |
6264 | Expr *getOrder() const { |
6265 | return cast<Expr>(SubExprs[ORDER]); |
6266 | } |
6267 | Expr *getScope() const { |
6268 | assert(getScopeModel() && "No scope")(static_cast <bool> (getScopeModel() && "No scope" ) ? void (0) : __assert_fail ("getScopeModel() && \"No scope\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 6268, __extension__ __PRETTY_FUNCTION__)); |
6269 | return cast<Expr>(SubExprs[NumSubExprs - 1]); |
6270 | } |
6271 | Expr *getVal1() const { |
6272 | if (Op == AO__c11_atomic_init || Op == AO__opencl_atomic_init) |
6273 | return cast<Expr>(SubExprs[ORDER]); |
6274 | assert(NumSubExprs > VAL1)(static_cast <bool> (NumSubExprs > VAL1) ? void (0) : __assert_fail ("NumSubExprs > VAL1", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 6274, __extension__ __PRETTY_FUNCTION__)); |
6275 | return cast<Expr>(SubExprs[VAL1]); |
6276 | } |
6277 | Expr *getOrderFail() const { |
6278 | assert(NumSubExprs > ORDER_FAIL)(static_cast <bool> (NumSubExprs > ORDER_FAIL) ? void (0) : __assert_fail ("NumSubExprs > ORDER_FAIL", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 6278, __extension__ __PRETTY_FUNCTION__)); |
6279 | return cast<Expr>(SubExprs[ORDER_FAIL]); |
6280 | } |
6281 | Expr *getVal2() const { |
6282 | if (Op == AO__atomic_exchange) |
6283 | return cast<Expr>(SubExprs[ORDER_FAIL]); |
6284 | assert(NumSubExprs > VAL2)(static_cast <bool> (NumSubExprs > VAL2) ? void (0) : __assert_fail ("NumSubExprs > VAL2", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 6284, __extension__ __PRETTY_FUNCTION__)); |
6285 | return cast<Expr>(SubExprs[VAL2]); |
6286 | } |
6287 | Expr *getWeak() const { |
6288 | assert(NumSubExprs > WEAK)(static_cast <bool> (NumSubExprs > WEAK) ? void (0) : __assert_fail ("NumSubExprs > WEAK", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 6288, __extension__ __PRETTY_FUNCTION__)); |
6289 | return cast<Expr>(SubExprs[WEAK]); |
6290 | } |
6291 | QualType getValueType() const; |
6292 | |
6293 | AtomicOp getOp() const { return Op; } |
6294 | unsigned getNumSubExprs() const { return NumSubExprs; } |
6295 | |
6296 | Expr **getSubExprs() { return reinterpret_cast<Expr **>(SubExprs); } |
6297 | const Expr * const *getSubExprs() const { |
6298 | return reinterpret_cast<Expr * const *>(SubExprs); |
6299 | } |
6300 | |
6301 | bool isVolatile() const { |
6302 | return getPtr()->getType()->getPointeeType().isVolatileQualified(); |
6303 | } |
6304 | |
6305 | bool isCmpXChg() const { |
6306 | return getOp() == AO__c11_atomic_compare_exchange_strong || |
6307 | getOp() == AO__c11_atomic_compare_exchange_weak || |
6308 | getOp() == AO__opencl_atomic_compare_exchange_strong || |
6309 | getOp() == AO__opencl_atomic_compare_exchange_weak || |
6310 | getOp() == AO__atomic_compare_exchange || |
6311 | getOp() == AO__atomic_compare_exchange_n; |
6312 | } |
6313 | |
6314 | bool isOpenCL() const { |
6315 | return getOp() >= AO__opencl_atomic_init && |
6316 | getOp() <= AO__opencl_atomic_fetch_max; |
6317 | } |
6318 | |
6319 | SourceLocation getBuiltinLoc() const { return BuiltinLoc; } |
6320 | SourceLocation getRParenLoc() const { return RParenLoc; } |
6321 | |
6322 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return BuiltinLoc; } |
6323 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return RParenLoc; } |
6324 | |
6325 | static bool classof(const Stmt *T) { |
6326 | return T->getStmtClass() == AtomicExprClass; |
6327 | } |
6328 | |
6329 | // Iterators |
6330 | child_range children() { |
6331 | return child_range(SubExprs, SubExprs+NumSubExprs); |
6332 | } |
6333 | const_child_range children() const { |
6334 | return const_child_range(SubExprs, SubExprs + NumSubExprs); |
6335 | } |
6336 | |
6337 | /// Get atomic scope model for the atomic op code. |
6338 | /// \return empty atomic scope model if the atomic op code does not have |
6339 | /// scope operand. |
6340 | static std::unique_ptr<AtomicScopeModel> getScopeModel(AtomicOp Op) { |
6341 | auto Kind = |
6342 | (Op >= AO__opencl_atomic_load && Op <= AO__opencl_atomic_fetch_max) |
6343 | ? AtomicScopeModelKind::OpenCL |
6344 | : AtomicScopeModelKind::None; |
6345 | return AtomicScopeModel::create(Kind); |
6346 | } |
6347 | |
6348 | /// Get atomic scope model. |
6349 | /// \return empty atomic scope model if this atomic expression does not have |
6350 | /// scope operand. |
6351 | std::unique_ptr<AtomicScopeModel> getScopeModel() const { |
6352 | return getScopeModel(getOp()); |
6353 | } |
6354 | }; |
6355 | |
6356 | /// TypoExpr - Internal placeholder for expressions where typo correction |
6357 | /// still needs to be performed and/or an error diagnostic emitted. |
6358 | class TypoExpr : public Expr { |
6359 | // The location for the typo name. |
6360 | SourceLocation TypoLoc; |
6361 | |
6362 | public: |
6363 | TypoExpr(QualType T, SourceLocation TypoLoc) |
6364 | : Expr(TypoExprClass, T, VK_LValue, OK_Ordinary), TypoLoc(TypoLoc) { |
6365 | assert(T->isDependentType() && "TypoExpr given a non-dependent type")(static_cast <bool> (T->isDependentType() && "TypoExpr given a non-dependent type") ? void (0) : __assert_fail ("T->isDependentType() && \"TypoExpr given a non-dependent type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/Expr.h" , 6365, __extension__ __PRETTY_FUNCTION__)); |
6366 | setDependence(ExprDependence::TypeValueInstantiation | |
6367 | ExprDependence::Error); |
6368 | } |
6369 | |
6370 | child_range children() { |
6371 | return child_range(child_iterator(), child_iterator()); |
6372 | } |
6373 | const_child_range children() const { |
6374 | return const_child_range(const_child_iterator(), const_child_iterator()); |
6375 | } |
6376 | |
6377 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return TypoLoc; } |
6378 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return TypoLoc; } |
6379 | |
6380 | static bool classof(const Stmt *T) { |
6381 | return T->getStmtClass() == TypoExprClass; |
6382 | } |
6383 | |
6384 | }; |
6385 | |
6386 | /// Frontend produces RecoveryExprs on semantic errors that prevent creating |
6387 | /// other well-formed expressions. E.g. when type-checking of a binary operator |
6388 | /// fails, we cannot produce a BinaryOperator expression. Instead, we can choose |
6389 | /// to produce a recovery expression storing left and right operands. |
6390 | /// |
6391 | /// RecoveryExpr does not have any semantic meaning in C++, it is only useful to |
6392 | /// preserve expressions in AST that would otherwise be dropped. It captures |
6393 | /// subexpressions of some expression that we could not construct and source |
6394 | /// range covered by the expression. |
6395 | /// |
6396 | /// By default, RecoveryExpr uses dependence-bits to take advantage of existing |
6397 | /// machinery to deal with dependent code in C++, e.g. RecoveryExpr is preserved |
6398 | /// in `decltype(<broken-expr>)` as part of the `DependentDecltypeType`. In |
6399 | /// addition to that, clang does not report most errors on dependent |
6400 | /// expressions, so we get rid of bogus errors for free. However, note that |
6401 | /// unlike other dependent expressions, RecoveryExpr can be produced in |
6402 | /// non-template contexts. |
6403 | /// |
6404 | /// We will preserve the type in RecoveryExpr when the type is known, e.g. |
6405 | /// preserving the return type for a broken non-overloaded function call, a |
6406 | /// overloaded call where all candidates have the same return type. In this |
6407 | /// case, the expression is not type-dependent (unless the known type is itself |
6408 | /// dependent) |
6409 | /// |
6410 | /// One can also reliably suppress all bogus errors on expressions containing |
6411 | /// recovery expressions by examining results of Expr::containsErrors(). |
6412 | class RecoveryExpr final : public Expr, |
6413 | private llvm::TrailingObjects<RecoveryExpr, Expr *> { |
6414 | public: |
6415 | static RecoveryExpr *Create(ASTContext &Ctx, QualType T, |
6416 | SourceLocation BeginLoc, SourceLocation EndLoc, |
6417 | ArrayRef<Expr *> SubExprs); |
6418 | static RecoveryExpr *CreateEmpty(ASTContext &Ctx, unsigned NumSubExprs); |
6419 | |
6420 | ArrayRef<Expr *> subExpressions() { |
6421 | auto *B = getTrailingObjects<Expr *>(); |
6422 | return llvm::makeArrayRef(B, B + NumExprs); |
6423 | } |
6424 | |
6425 | ArrayRef<const Expr *> subExpressions() const { |
6426 | return const_cast<RecoveryExpr *>(this)->subExpressions(); |
6427 | } |
6428 | |
6429 | child_range children() { |
6430 | Stmt **B = reinterpret_cast<Stmt **>(getTrailingObjects<Expr *>()); |
6431 | return child_range(B, B + NumExprs); |
6432 | } |
6433 | |
6434 | SourceLocation getBeginLoc() const { return BeginLoc; } |
6435 | SourceLocation getEndLoc() const { return EndLoc; } |
6436 | |
6437 | static bool classof(const Stmt *T) { |
6438 | return T->getStmtClass() == RecoveryExprClass; |
6439 | } |
6440 | |
6441 | private: |
6442 | RecoveryExpr(ASTContext &Ctx, QualType T, SourceLocation BeginLoc, |
6443 | SourceLocation EndLoc, ArrayRef<Expr *> SubExprs); |
6444 | RecoveryExpr(EmptyShell Empty, unsigned NumSubExprs) |
6445 | : Expr(RecoveryExprClass, Empty), NumExprs(NumSubExprs) {} |
6446 | |
6447 | size_t numTrailingObjects(OverloadToken<Stmt *>) const { return NumExprs; } |
6448 | |
6449 | SourceLocation BeginLoc, EndLoc; |
6450 | unsigned NumExprs; |
6451 | friend TrailingObjects; |
6452 | friend class ASTStmtReader; |
6453 | friend class ASTStmtWriter; |
6454 | }; |
6455 | |
6456 | } // end namespace clang |
6457 | |
6458 | #endif // LLVM_CLANG_AST_EXPR_H |